drivers/usb/gadget/udc/renesas_usb3.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Renesas USB3.0 Peripheral driver (USB gadget)
   4  *
   5  * Copyright (C) 2015-2017  Renesas Electronics Corporation
   6  */
   7
   8 #include <linux/debugfs.h>
   9 #include <linux/delay.h>
  10 #include <linux/dma-mapping.h>
  11 #include <linux/err.h>
  12 #include <linux/extcon-provider.h>
  13 #include <linux/interrupt.h>
  14 #include <linux/io.h>
  15 #include <linux/module.h>
  16 #include <linux/of_device.h>
  17 #include <linux/phy/phy.h>
  18 #include <linux/platform_device.h>
  19 #include <linux/pm_runtime.h>
  20 #include <linux/sizes.h>
  21 #include <linux/slab.h>
  22 #include <linux/string.h>
  23 #include <linux/sys_soc.h>
  24 #include <linux/uaccess.h>
  25 #include <linux/usb/ch9.h>
  26 #include <linux/usb/gadget.h>
  27 #include <linux/usb/of.h>
  28 #include <linux/usb/role.h>
  29
  30 /* register definitions */
  31 #define USB3_AXI_INT_STA        0x008
  32 #define USB3_AXI_INT_ENA        0x00c
  33 #define USB3_DMA_INT_STA        0x010
  34 #define USB3_DMA_INT_ENA        0x014
  35 #define USB3_DMA_CH0_CON(n)     (0x030 + ((n) - 1) * 0x10) /* n = 1 to 4 */
  36 #define USB3_DMA_CH0_PRD_ADR(n) (0x034 + ((n) - 1) * 0x10) /* n = 1 to 4 */
  37 #define USB3_USB_COM_CON        0x200
  38 #define USB3_USB20_CON          0x204
  39 #define USB3_USB30_CON          0x208
  40 #define USB3_USB_STA            0x210
  41 #define USB3_DRD_CON            0x218
  42 #define USB3_USB_INT_STA_1      0x220
  43 #define USB3_USB_INT_STA_2      0x224
  44 #define USB3_USB_INT_ENA_1      0x228
  45 #define USB3_USB_INT_ENA_2      0x22c
  46 #define USB3_STUP_DAT_0         0x230
  47 #define USB3_STUP_DAT_1         0x234
  48 #define USB3_USB_OTG_STA        0x268
  49 #define USB3_USB_OTG_INT_STA    0x26c
  50 #define USB3_USB_OTG_INT_ENA    0x270
  51 #define USB3_P0_MOD             0x280
  52 #define USB3_P0_CON             0x288
  53 #define USB3_P0_STA             0x28c
  54 #define USB3_P0_INT_STA         0x290
  55 #define USB3_P0_INT_ENA         0x294
  56 #define USB3_P0_LNG             0x2a0
  57 #define USB3_P0_READ            0x2a4
  58 #define USB3_P0_WRITE           0x2a8
  59 #define USB3_PIPE_COM           0x2b0
  60 #define USB3_PN_MOD             0x2c0
  61 #define USB3_PN_RAMMAP          0x2c4
  62 #define USB3_PN_CON             0x2c8
  63 #define USB3_PN_STA             0x2cc
  64 #define USB3_PN_INT_STA         0x2d0
  65 #define USB3_PN_INT_ENA         0x2d4
  66 #define USB3_PN_LNG             0x2e0
  67 #define USB3_PN_READ            0x2e4
  68 #define USB3_PN_WRITE           0x2e8
  69 #define USB3_SSIFCMD            0x340
  70
  71 /* AXI_INT_ENA and AXI_INT_STA */
  72 #define AXI_INT_DMAINT          BIT(31)
  73 #define AXI_INT_EPCINT          BIT(30)
  74 /* PRD's n = from 1 to 4 */
  75 #define AXI_INT_PRDEN_CLR_STA_SHIFT(n)  (16 + (n) - 1)
  76 #define AXI_INT_PRDERR_STA_SHIFT(n)     (0 + (n) - 1)
  77 #define AXI_INT_PRDEN_CLR_STA(n)        (1 << AXI_INT_PRDEN_CLR_STA_SHIFT(n))
  78 #define AXI_INT_PRDERR_STA(n)           (1 << AXI_INT_PRDERR_STA_SHIFT(n))
  79
  80 /* DMA_INT_ENA and DMA_INT_STA */
  81 #define DMA_INT(n)              BIT(n)
  82
  83 /* DMA_CH0_CONn */
  84 #define DMA_CON_PIPE_DIR        BIT(15)         /* 1: In Transfer */
  85 #define DMA_CON_PIPE_NO_SHIFT   8
  86 #define DMA_CON_PIPE_NO_MASK    GENMASK(12, DMA_CON_PIPE_NO_SHIFT)
  87 #define DMA_COM_PIPE_NO(n)      (((n) << DMA_CON_PIPE_NO_SHIFT) & \
  88                                          DMA_CON_PIPE_NO_MASK)
  89 #define DMA_CON_PRD_EN          BIT(0)
  90
  91 /* LCLKSEL */
  92 #define LCLKSEL_LSEL            BIT(18)
  93
  94 /* USB_COM_CON */
  95 #define USB_COM_CON_CONF                BIT(24)
  96 #define USB_COM_CON_PN_WDATAIF_NL       BIT(23)
  97 #define USB_COM_CON_PN_RDATAIF_NL       BIT(22)
  98 #define USB_COM_CON_PN_LSTTR_PP         BIT(21)
  99 #define USB_COM_CON_SPD_MODE            BIT(17)
 100 #define USB_COM_CON_EP0_EN              BIT(16)
 101 #define USB_COM_CON_DEV_ADDR_SHIFT      8
 102 #define USB_COM_CON_DEV_ADDR_MASK       GENMASK(14, USB_COM_CON_DEV_ADDR_SHIFT)
 103 #define USB_COM_CON_DEV_ADDR(n)         (((n) << USB_COM_CON_DEV_ADDR_SHIFT) & \
 104                                          USB_COM_CON_DEV_ADDR_MASK)
 105 #define USB_COM_CON_RX_DETECTION        BIT(1)
 106 #define USB_COM_CON_PIPE_CLR            BIT(0)
 107
 108 /* USB20_CON */
 109 #define USB20_CON_B2_PUE                BIT(31)
 110 #define USB20_CON_B2_SUSPEND            BIT(24)
 111 #define USB20_CON_B2_CONNECT            BIT(17)
 112 #define USB20_CON_B2_TSTMOD_SHIFT       8
 113 #define USB20_CON_B2_TSTMOD_MASK        GENMASK(10, USB20_CON_B2_TSTMOD_SHIFT)
 114 #define USB20_CON_B2_TSTMOD(n)          (((n) << USB20_CON_B2_TSTMOD_SHIFT) & \
 115                                          USB20_CON_B2_TSTMOD_MASK)
 116 #define USB20_CON_B2_TSTMOD_EN          BIT(0)
 117
 118 /* USB30_CON */
 119 #define USB30_CON_POW_SEL_SHIFT         24
 120 #define USB30_CON_POW_SEL_MASK          GENMASK(26, USB30_CON_POW_SEL_SHIFT)
 121 #define USB30_CON_POW_SEL_IN_U3         BIT(26)
 122 #define USB30_CON_POW_SEL_IN_DISCON     0
 123 #define USB30_CON_POW_SEL_P2_TO_P0      BIT(25)
 124 #define USB30_CON_POW_SEL_P0_TO_P3      BIT(24)
 125 #define USB30_CON_POW_SEL_P0_TO_P2      0
 126 #define USB30_CON_B3_PLLWAKE            BIT(23)
 127 #define USB30_CON_B3_CONNECT            BIT(17)
 128 #define USB30_CON_B3_HOTRST_CMP         BIT(1)
 129
 130 /* USB_STA */
 131 #define USB_STA_SPEED_MASK      (BIT(2) | BIT(1))
 132 #define USB_STA_SPEED_HS        BIT(2)
 133 #define USB_STA_SPEED_FS        BIT(1)
 134 #define USB_STA_SPEED_SS        0
 135 #define USB_STA_VBUS_STA        BIT(0)
 136
 137 /* DRD_CON */
 138 #define DRD_CON_PERI_CON        BIT(24)
 139 #define DRD_CON_VBOUT           BIT(0)
 140
 141 /* USB_INT_ENA_1 and USB_INT_STA_1 */
 142 #define USB_INT_1_B3_PLLWKUP    BIT(31)
 143 #define USB_INT_1_B3_LUPSUCS    BIT(30)
 144 #define USB_INT_1_B3_DISABLE    BIT(27)
 145 #define USB_INT_1_B3_WRMRST     BIT(21)
 146 #define USB_INT_1_B3_HOTRST     BIT(20)
 147 #define USB_INT_1_B2_USBRST     BIT(12)
 148 #define USB_INT_1_B2_L1SPND     BIT(11)
 149 #define USB_INT_1_B2_SPND       BIT(9)
 150 #define USB_INT_1_B2_RSUM       BIT(8)
 151 #define USB_INT_1_SPEED         BIT(1)
 152 #define USB_INT_1_VBUS_CNG      BIT(0)
 153
 154 /* USB_INT_ENA_2 and USB_INT_STA_2 */
 155 #define USB_INT_2_PIPE(n)       BIT(n)
 156
 157 /* USB_OTG_STA, USB_OTG_INT_STA and USB_OTG_INT_ENA */
 158 #define USB_OTG_IDMON           BIT(4)
 159
 160 /* P0_MOD */
 161 #define P0_MOD_DIR              BIT(6)
 162
 163 /* P0_CON and PN_CON */
 164 #define PX_CON_BYTE_EN_MASK             (BIT(10) | BIT(9))
 165 #define PX_CON_BYTE_EN_SHIFT            9
 166 #define PX_CON_BYTE_EN_BYTES(n)         (((n) << PX_CON_BYTE_EN_SHIFT) & \
 167                                          PX_CON_BYTE_EN_MASK)
 168 #define PX_CON_SEND                     BIT(8)
 169
 170 /* P0_CON */
 171 #define P0_CON_ST_RES_MASK              (BIT(27) | BIT(26))
 172 #define P0_CON_ST_RES_FORCE_STALL       BIT(27)
 173 #define P0_CON_ST_RES_NORMAL            BIT(26)
 174 #define P0_CON_ST_RES_FORCE_NRDY        0
 175 #define P0_CON_OT_RES_MASK              (BIT(25) | BIT(24))
 176 #define P0_CON_OT_RES_FORCE_STALL       BIT(25)
 177 #define P0_CON_OT_RES_NORMAL            BIT(24)
 178 #define P0_CON_OT_RES_FORCE_NRDY        0
 179 #define P0_CON_IN_RES_MASK              (BIT(17) | BIT(16))
 180 #define P0_CON_IN_RES_FORCE_STALL       BIT(17)
 181 #define P0_CON_IN_RES_NORMAL            BIT(16)
 182 #define P0_CON_IN_RES_FORCE_NRDY        0
 183 #define P0_CON_RES_WEN                  BIT(7)
 184 #define P0_CON_BCLR                     BIT(1)
 185
 186 /* P0_STA and PN_STA */
 187 #define PX_STA_BUFSTS           BIT(0)
 188
 189 /* P0_INT_ENA and P0_INT_STA */
 190 #define P0_INT_STSED            BIT(18)
 191 #define P0_INT_STSST            BIT(17)
 192 #define P0_INT_SETUP            BIT(16)
 193 #define P0_INT_RCVNL            BIT(8)
 194 #define P0_INT_ERDY             BIT(7)
 195 #define P0_INT_FLOW             BIT(6)
 196 #define P0_INT_STALL            BIT(2)
 197 #define P0_INT_NRDY             BIT(1)
 198 #define P0_INT_BFRDY            BIT(0)
 199 #define P0_INT_ALL_BITS         (P0_INT_STSED | P0_INT_SETUP | P0_INT_BFRDY)
 200
 201 /* PN_MOD */
 202 #define PN_MOD_DIR              BIT(6)
 203 #define PN_MOD_TYPE_SHIFT       4
 204 #define PN_MOD_TYPE_MASK        GENMASK(5, PN_MOD_TYPE_SHIFT)
 205 #define PN_MOD_TYPE(n)          (((n) << PN_MOD_TYPE_SHIFT) & \
 206                                  PN_MOD_TYPE_MASK)
 207 #define PN_MOD_EPNUM_MASK       GENMASK(3, 0)
 208 #define PN_MOD_EPNUM(n)         ((n) & PN_MOD_EPNUM_MASK)
 209
 210 /* PN_RAMMAP */
 211 #define PN_RAMMAP_RAMAREA_SHIFT 29
 212 #define PN_RAMMAP_RAMAREA_MASK  GENMASK(31, PN_RAMMAP_RAMAREA_SHIFT)
 213 #define PN_RAMMAP_RAMAREA_16KB  BIT(31)
 214 #define PN_RAMMAP_RAMAREA_8KB   (BIT(30) | BIT(29))
 215 #define PN_RAMMAP_RAMAREA_4KB   BIT(30)
 216 #define PN_RAMMAP_RAMAREA_2KB   BIT(29)
 217 #define PN_RAMMAP_RAMAREA_1KB   0
 218 #define PN_RAMMAP_MPKT_SHIFT    16
 219 #define PN_RAMMAP_MPKT_MASK     GENMASK(26, PN_RAMMAP_MPKT_SHIFT)
 220 #define PN_RAMMAP_MPKT(n)       (((n) << PN_RAMMAP_MPKT_SHIFT) & \
 221                                  PN_RAMMAP_MPKT_MASK)
 222 #define PN_RAMMAP_RAMIF_SHIFT   14
 223 #define PN_RAMMAP_RAMIF_MASK    GENMASK(15, PN_RAMMAP_RAMIF_SHIFT)
 224 #define PN_RAMMAP_RAMIF(n)      (((n) << PN_RAMMAP_RAMIF_SHIFT) & \
 225                                  PN_RAMMAP_RAMIF_MASK)
 226 #define PN_RAMMAP_BASEAD_MASK   GENMASK(13, 0)
 227 #define PN_RAMMAP_BASEAD(offs)  (((offs) >> 3) & PN_RAMMAP_BASEAD_MASK)
 228 #define PN_RAMMAP_DATA(area, ramif, basead)     ((PN_RAMMAP_##area) | \
 229                                                  (PN_RAMMAP_RAMIF(ramif)) | \
 230                                                  (PN_RAMMAP_BASEAD(basead)))
 231
 232 /* PN_CON */
 233 #define PN_CON_EN               BIT(31)
 234 #define PN_CON_DATAIF_EN        BIT(30)
 235 #define PN_CON_RES_MASK         (BIT(17) | BIT(16))
 236 #define PN_CON_RES_FORCE_STALL  BIT(17)
 237 #define PN_CON_RES_NORMAL       BIT(16)
 238 #define PN_CON_RES_FORCE_NRDY   0
 239 #define PN_CON_LAST             BIT(11)
 240 #define PN_CON_RES_WEN          BIT(7)
 241 #define PN_CON_CLR              BIT(0)
 242
 243 /* PN_INT_STA and PN_INT_ENA */
 244 #define PN_INT_LSTTR    BIT(4)
 245 #define PN_INT_BFRDY    BIT(0)
 246
 247 /* USB3_SSIFCMD */
 248 #define SSIFCMD_URES_U2         BIT(9)
 249 #define SSIFCMD_URES_U1         BIT(8)
 250 #define SSIFCMD_UDIR_U2         BIT(7)
 251 #define SSIFCMD_UDIR_U1         BIT(6)
 252 #define SSIFCMD_UREQ_U2         BIT(5)
 253 #define SSIFCMD_UREQ_U1         BIT(4)
 254
 255 #define USB3_EP0_SS_MAX_PACKET_SIZE     512
 256 #define USB3_EP0_HSFS_MAX_PACKET_SIZE   64
 257 #define USB3_EP0_BUF_SIZE               8
 258 #define USB3_MAX_NUM_PIPES              6       /* This includes PIPE 0 */
 259 #define USB3_WAIT_US                    3
 260 #define USB3_DMA_NUM_SETTING_AREA       4
 261 /*
 262  * To avoid double-meaning of "0" (xferred 65536 bytes or received zlp if
 263  * buffer size is 65536), this driver uses the maximum size per a entry is
 264  * 32768 bytes.
 265  */
 266 #define USB3_DMA_MAX_XFER_SIZE          32768
 267 #define USB3_DMA_PRD_SIZE               4096
 268
 269 struct renesas_usb3;
 270
 271 /* Physical Region Descriptor Table */
 272 struct renesas_usb3_prd {
 273         u32 word1;
 274 #define USB3_PRD1_E             BIT(30)         /* the end of chain */
 275 #define USB3_PRD1_U             BIT(29)         /* completion of transfer */
 276 #define USB3_PRD1_D             BIT(28)         /* Error occurred */
 277 #define USB3_PRD1_INT           BIT(27)         /* Interrupt occurred */
 278 #define USB3_PRD1_LST           BIT(26)         /* Last Packet */
 279 #define USB3_PRD1_B_INC         BIT(24)
 280 #define USB3_PRD1_MPS_8         0
 281 #define USB3_PRD1_MPS_16        BIT(21)
 282 #define USB3_PRD1_MPS_32        BIT(22)
 283 #define USB3_PRD1_MPS_64        (BIT(22) | BIT(21))
 284 #define USB3_PRD1_MPS_512       BIT(23)
 285 #define USB3_PRD1_MPS_1024      (BIT(23) | BIT(21))
 286 #define USB3_PRD1_MPS_RESERVED  (BIT(23) | BIT(22) | BIT(21))
 287 #define USB3_PRD1_SIZE_MASK     GENMASK(15, 0)
 288
 289         u32 bap;
 290 };
 291 #define USB3_DMA_NUM_PRD_ENTRIES        (USB3_DMA_PRD_SIZE / \
 292                                           sizeof(struct renesas_usb3_prd))
 293 #define USB3_DMA_MAX_XFER_SIZE_ALL_PRDS (USB3_DMA_PRD_SIZE / \
 294                                          sizeof(struct renesas_usb3_prd) * \
 295                                          USB3_DMA_MAX_XFER_SIZE)
 296
 297 struct renesas_usb3_dma {
 298         struct renesas_usb3_prd *prd;
 299         dma_addr_t prd_dma;
 300         int num;        /* Setting area number (from 1 to 4) */
 301         bool used;
 302 };
 303
 304 struct renesas_usb3_request {
 305         struct usb_request      req;
 306         struct list_head        queue;
 307 };
 308
 309 #define USB3_EP_NAME_SIZE       8
 310 struct renesas_usb3_ep {
 311         struct usb_ep ep;
 312         struct renesas_usb3 *usb3;
 313         struct renesas_usb3_dma *dma;
 314         int num;
 315         char ep_name[USB3_EP_NAME_SIZE];
 316         struct list_head queue;
 317         u32 rammap_val;
 318         bool dir_in;
 319         bool halt;
 320         bool wedge;
 321         bool started;
 322 };
 323
 324 struct renesas_usb3_priv {
 325         int ramsize_per_ramif;          /* unit = bytes */
 326         int num_ramif;
 327         int ramsize_per_pipe;           /* unit = bytes */
 328         bool workaround_for_vbus;       /* if true, don't check vbus signal */
 329 };
 330
 331 struct renesas_usb3 {
 332         void __iomem *reg;
 333
 334         struct usb_gadget gadget;
 335         struct usb_gadget_driver *driver;
 336         struct extcon_dev *extcon;
 337         struct work_struct extcon_work;
 338         struct phy *phy;
 339         struct dentry *dentry;
 340
 341         struct usb_role_switch *role_sw;
 342         struct device *host_dev;
 343         struct work_struct role_work;
 344         enum usb_role role;
 345
 346         struct renesas_usb3_ep *usb3_ep;
 347         int num_usb3_eps;
 348
 349         struct renesas_usb3_dma dma[USB3_DMA_NUM_SETTING_AREA];
 350
 351         spinlock_t lock;
 352         int disabled_count;
 353
 354         struct usb_request *ep0_req;
 355
 356         enum usb_role connection_state;
 357         u16 test_mode;
 358         u8 ep0_buf[USB3_EP0_BUF_SIZE];
 359         bool softconnect;
 360         bool workaround_for_vbus;
 361         bool extcon_host;               /* check id and set EXTCON_USB_HOST */
 362         bool extcon_usb;                /* check vbus and set EXTCON_USB */
 363         bool forced_b_device;
 364         bool start_to_connect;
 365         bool role_sw_by_connector;
 366 };
 367
 368 #define gadget_to_renesas_usb3(_gadget) \
 369                 container_of(_gadget, struct renesas_usb3, gadget)
 370 #define renesas_usb3_to_gadget(renesas_usb3) (&renesas_usb3->gadget)
 371 #define usb3_to_dev(_usb3)      (_usb3->gadget.dev.parent)
 372
 373 #define usb_ep_to_usb3_ep(_ep) container_of(_ep, struct renesas_usb3_ep, ep)
 374 #define usb3_ep_to_usb3(_usb3_ep) (_usb3_ep->usb3)
 375 #define usb_req_to_usb3_req(_req) container_of(_req, \
 376                                             struct renesas_usb3_request, req)
 377
 378 #define usb3_get_ep(usb3, n) ((usb3)->usb3_ep + (n))
 379 #define usb3_for_each_ep(usb3_ep, usb3, i)                      \
 380                 for ((i) = 0, usb3_ep = usb3_get_ep(usb3, (i)); \
 381                      (i) < (usb3)->num_usb3_eps;                \
 382                      (i)++, usb3_ep = usb3_get_ep(usb3, (i)))
 383
 384 #define usb3_get_dma(usb3, i)   (&(usb3)->dma[i])
 385 #define usb3_for_each_dma(usb3, dma, i)                         \
 386                 for ((i) = 0, dma = usb3_get_dma((usb3), (i));  \
 387                      (i) < USB3_DMA_NUM_SETTING_AREA;           \
 388                      (i)++, dma = usb3_get_dma((usb3), (i)))
 389
 390 static const char udc_name[] = "renesas_usb3";
 391
 392 static bool use_dma = 1;
 393 module_param(use_dma, bool, 0644);
 394 MODULE_PARM_DESC(use_dma, "use dedicated DMAC");
 395
 396 static void usb3_write(struct renesas_usb3 *usb3, u32 data, u32 offs)
 397 {
 398         iowrite32(data, usb3->reg + offs);
 399 }
 400
 401 static u32 usb3_read(struct renesas_usb3 *usb3, u32 offs)
 402 {
 403         return ioread32(usb3->reg + offs);
 404 }
 405
 406 static void usb3_set_bit(struct renesas_usb3 *usb3, u32 bits, u32 offs)
 407 {
 408         u32 val = usb3_read(usb3, offs);
 409
 410         val |= bits;
 411         usb3_write(usb3, val, offs);
 412 }
 413
 414 static void usb3_clear_bit(struct renesas_usb3 *usb3, u32 bits, u32 offs)
 415 {
 416         u32 val = usb3_read(usb3, offs);
 417
 418         val &= ~bits;
 419         usb3_write(usb3, val, offs);
 420 }
 421
 422 static int usb3_wait(struct renesas_usb3 *usb3, u32 reg, u32 mask,
 423                      u32 expected)
 424 {
 425         int i;
 426
 427         for (i = 0; i < USB3_WAIT_US; i++) {
 428                 if ((usb3_read(usb3, reg) & mask) == expected)
 429                         return 0;
 430                 udelay(1);
 431         }
 432
 433         dev_dbg(usb3_to_dev(usb3), "%s: timed out (%8x, %08x, %08x)\n",
 434                 __func__, reg, mask, expected);
 435
 436         return -EBUSY;
 437 }
 438
 439 static void renesas_usb3_extcon_work(struct work_struct *work)
 440 {
 441         struct renesas_usb3 *usb3 = container_of(work, struct renesas_usb3,
 442                                                  extcon_work);
 443
 444         extcon_set_state_sync(usb3->extcon, EXTCON_USB_HOST, usb3->extcon_host);
 445         extcon_set_state_sync(usb3->extcon, EXTCON_USB, usb3->extcon_usb);
 446 }
 447
 448 static void usb3_enable_irq_1(struct renesas_usb3 *usb3, u32 bits)
 449 {
 450         usb3_set_bit(usb3, bits, USB3_USB_INT_ENA_1);
 451 }
 452
 453 static void usb3_disable_irq_1(struct renesas_usb3 *usb3, u32 bits)
 454 {
 455         usb3_clear_bit(usb3, bits, USB3_USB_INT_ENA_1);
 456 }
 457
 458 static void usb3_enable_pipe_irq(struct renesas_usb3 *usb3, int num)
 459 {
 460         usb3_set_bit(usb3, USB_INT_2_PIPE(num), USB3_USB_INT_ENA_2);
 461 }
 462
 463 static void usb3_disable_pipe_irq(struct renesas_usb3 *usb3, int num)
 464 {
 465         usb3_clear_bit(usb3, USB_INT_2_PIPE(num), USB3_USB_INT_ENA_2);
 466 }
 467
 468 static bool usb3_is_host(struct renesas_usb3 *usb3)
 469 {
 470         return !(usb3_read(usb3, USB3_DRD_CON) & DRD_CON_PERI_CON);
 471 }
 472
 473 static void usb3_init_axi_bridge(struct renesas_usb3 *usb3)
 474 {
 475         /* Set AXI_INT */
 476         usb3_write(usb3, ~0, USB3_DMA_INT_STA);
 477         usb3_write(usb3, 0, USB3_DMA_INT_ENA);
 478         usb3_set_bit(usb3, AXI_INT_DMAINT | AXI_INT_EPCINT, USB3_AXI_INT_ENA);
 479 }
 480
 481 static void usb3_init_epc_registers(struct renesas_usb3 *usb3)
 482 {
 483         usb3_write(usb3, ~0, USB3_USB_INT_STA_1);
 484         if (!usb3->workaround_for_vbus)
 485                 usb3_enable_irq_1(usb3, USB_INT_1_VBUS_CNG);
 486 }
 487
 488 static bool usb3_wakeup_usb2_phy(struct renesas_usb3 *usb3)
 489 {
 490         if (!(usb3_read(usb3, USB3_USB20_CON) & USB20_CON_B2_SUSPEND))
 491                 return true;    /* already waked it up */
 492
 493         usb3_clear_bit(usb3, USB20_CON_B2_SUSPEND, USB3_USB20_CON);
 494         usb3_enable_irq_1(usb3, USB_INT_1_B2_RSUM);
 495
 496         return false;
 497 }
 498
 499 static void usb3_usb2_pullup(struct renesas_usb3 *usb3, int pullup)
 500 {
 501         u32 bits = USB20_CON_B2_PUE | USB20_CON_B2_CONNECT;
 502
 503         if (usb3->softconnect && pullup)
 504                 usb3_set_bit(usb3, bits, USB3_USB20_CON);
 505         else
 506                 usb3_clear_bit(usb3, bits, USB3_USB20_CON);
 507 }
 508
 509 static void usb3_set_test_mode(struct renesas_usb3 *usb3)
 510 {
 511         u32 val = usb3_read(usb3, USB3_USB20_CON);
 512
 513         val &= ~USB20_CON_B2_TSTMOD_MASK;
 514         val |= USB20_CON_B2_TSTMOD(usb3->test_mode);
 515         usb3_write(usb3, val | USB20_CON_B2_TSTMOD_EN, USB3_USB20_CON);
 516         if (!usb3->test_mode)
 517                 usb3_clear_bit(usb3, USB20_CON_B2_TSTMOD_EN, USB3_USB20_CON);
 518 }
 519
 520 static void usb3_start_usb2_connection(struct renesas_usb3 *usb3)
 521 {
 522         usb3->disabled_count++;
 523         usb3_set_bit(usb3, USB_COM_CON_EP0_EN, USB3_USB_COM_CON);
 524         usb3_set_bit(usb3, USB_COM_CON_SPD_MODE, USB3_USB_COM_CON);
 525         usb3_usb2_pullup(usb3, 1);
 526 }
 527
 528 static int usb3_is_usb3_phy_in_u3(struct renesas_usb3 *usb3)
 529 {
 530         return usb3_read(usb3, USB3_USB30_CON) & USB30_CON_POW_SEL_IN_U3;
 531 }
 532
 533 static bool usb3_wakeup_usb3_phy(struct renesas_usb3 *usb3)
 534 {
 535         if (!usb3_is_usb3_phy_in_u3(usb3))
 536                 return true;    /* already waked it up */
 537
 538         usb3_set_bit(usb3, USB30_CON_B3_PLLWAKE, USB3_USB30_CON);
 539         usb3_enable_irq_1(usb3, USB_INT_1_B3_PLLWKUP);
 540
 541         return false;
 542 }
 543
 544 static u16 usb3_feature_get_un_enabled(struct renesas_usb3 *usb3)
 545 {
 546         u32 mask_u2 = SSIFCMD_UDIR_U2 | SSIFCMD_UREQ_U2;
 547         u32 mask_u1 = SSIFCMD_UDIR_U1 | SSIFCMD_UREQ_U1;
 548         u32 val = usb3_read(usb3, USB3_SSIFCMD);
 549         u16 ret = 0;
 550
 551         /* Enables {U2,U1} if the bits of UDIR and UREQ are set to 0 */
 552         if (!(val & mask_u2))
 553                 ret |= 1 << USB_DEV_STAT_U2_ENABLED;
 554         if (!(val & mask_u1))
 555                 ret |= 1 << USB_DEV_STAT_U1_ENABLED;
 556
 557         return ret;
 558 }
 559
 560 static void usb3_feature_u2_enable(struct renesas_usb3 *usb3, bool enable)
 561 {
 562         u32 bits = SSIFCMD_UDIR_U2 | SSIFCMD_UREQ_U2;
 563
 564         /* Enables U2 if the bits of UDIR and UREQ are set to 0 */
 565         if (enable)
 566                 usb3_clear_bit(usb3, bits, USB3_SSIFCMD);
 567         else
 568                 usb3_set_bit(usb3, bits, USB3_SSIFCMD);
 569 }
 570
 571 static void usb3_feature_u1_enable(struct renesas_usb3 *usb3, bool enable)
 572 {
 573         u32 bits = SSIFCMD_UDIR_U1 | SSIFCMD_UREQ_U1;
 574
 575         /* Enables U1 if the bits of UDIR and UREQ are set to 0 */
 576         if (enable)
 577                 usb3_clear_bit(usb3, bits, USB3_SSIFCMD);
 578         else
 579                 usb3_set_bit(usb3, bits, USB3_SSIFCMD);
 580 }
 581
 582 static void usb3_start_operation_for_usb3(struct renesas_usb3 *usb3)
 583 {
 584         usb3_set_bit(usb3, USB_COM_CON_EP0_EN, USB3_USB_COM_CON);
 585         usb3_clear_bit(usb3, USB_COM_CON_SPD_MODE, USB3_USB_COM_CON);
 586         usb3_set_bit(usb3, USB30_CON_B3_CONNECT, USB3_USB30_CON);
 587 }
 588
 589 static void usb3_start_usb3_connection(struct renesas_usb3 *usb3)
 590 {
 591         usb3_start_operation_for_usb3(usb3);
 592         usb3_set_bit(usb3, USB_COM_CON_RX_DETECTION, USB3_USB_COM_CON);
 593
 594         usb3_enable_irq_1(usb3, USB_INT_1_B3_LUPSUCS | USB_INT_1_B3_DISABLE |
 595                           USB_INT_1_SPEED);
 596 }
 597
 598 static void usb3_stop_usb3_connection(struct renesas_usb3 *usb3)
 599 {
 600         usb3_clear_bit(usb3, USB30_CON_B3_CONNECT, USB3_USB30_CON);
 601 }
 602
 603 static void usb3_transition_to_default_state(struct renesas_usb3 *usb3,
 604                                              bool is_usb3)
 605 {
 606         usb3_set_bit(usb3, USB_INT_2_PIPE(0), USB3_USB_INT_ENA_2);
 607         usb3_write(usb3, P0_INT_ALL_BITS, USB3_P0_INT_STA);
 608         usb3_set_bit(usb3, P0_INT_ALL_BITS, USB3_P0_INT_ENA);
 609
 610         if (is_usb3)
 611                 usb3_enable_irq_1(usb3, USB_INT_1_B3_WRMRST |
 612                                   USB_INT_1_B3_HOTRST);
 613         else
 614                 usb3_enable_irq_1(usb3, USB_INT_1_B2_SPND |
 615                                   USB_INT_1_B2_L1SPND | USB_INT_1_B2_USBRST);
 616 }
 617
 618 static void usb3_connect(struct renesas_usb3 *usb3)
 619 {
 620         if (usb3_wakeup_usb3_phy(usb3))
 621                 usb3_start_usb3_connection(usb3);
 622 }
 623
 624 static void usb3_reset_epc(struct renesas_usb3 *usb3)
 625 {
 626         usb3_clear_bit(usb3, USB_COM_CON_CONF, USB3_USB_COM_CON);
 627         usb3_clear_bit(usb3, USB_COM_CON_EP0_EN, USB3_USB_COM_CON);
 628         usb3_set_bit(usb3, USB_COM_CON_PIPE_CLR, USB3_USB_COM_CON);
 629         usb3->test_mode = 0;
 630         usb3_set_test_mode(usb3);
 631 }
 632
 633 static void usb3_disconnect(struct renesas_usb3 *usb3)
 634 {
 635         usb3->disabled_count = 0;
 636         usb3_usb2_pullup(usb3, 0);
 637         usb3_clear_bit(usb3, USB30_CON_B3_CONNECT, USB3_USB30_CON);
 638         usb3_reset_epc(usb3);
 639         usb3_disable_irq_1(usb3, USB_INT_1_B2_RSUM | USB_INT_1_B3_PLLWKUP |
 640                            USB_INT_1_B3_LUPSUCS | USB_INT_1_B3_DISABLE |
 641                            USB_INT_1_SPEED | USB_INT_1_B3_WRMRST |
 642                            USB_INT_1_B3_HOTRST | USB_INT_1_B2_SPND |
 643                            USB_INT_1_B2_L1SPND | USB_INT_1_B2_USBRST);
 644         usb3_clear_bit(usb3, USB_COM_CON_SPD_MODE, USB3_USB_COM_CON);
 645         usb3_init_epc_registers(usb3);
 646
 647         if (usb3->driver)
 648                 usb3->driver->disconnect(&usb3->gadget);
 649 }
 650
 651 static void usb3_check_vbus(struct renesas_usb3 *usb3)
 652 {
 653         if (usb3->workaround_for_vbus) {
 654                 usb3_connect(usb3);
 655         } else {
 656                 usb3->extcon_usb = !!(usb3_read(usb3, USB3_USB_STA) &
 657                                                         USB_STA_VBUS_STA);
 658                 if (usb3->extcon_usb)
 659                         usb3_connect(usb3);
 660                 else
 661                         usb3_disconnect(usb3);
 662
 663                 schedule_work(&usb3->extcon_work);
 664         }
 665 }
 666
 667 static void renesas_usb3_role_work(struct work_struct *work)
 668 {
 669         struct renesas_usb3 *usb3 =
 670                         container_of(work, struct renesas_usb3, role_work);
 671
 672         usb_role_switch_set_role(usb3->role_sw, usb3->role);
 673 }
 674
 675 static void usb3_set_mode(struct renesas_usb3 *usb3, bool host)
 676 {
 677         if (host)
 678                 usb3_clear_bit(usb3, DRD_CON_PERI_CON, USB3_DRD_CON);
 679         else
 680                 usb3_set_bit(usb3, DRD_CON_PERI_CON, USB3_DRD_CON);
 681 }
 682
 683 static void usb3_set_mode_by_role_sw(struct renesas_usb3 *usb3, bool host)
 684 {
 685         if (usb3->role_sw) {
 686                 usb3->role = host ? USB_ROLE_HOST : USB_ROLE_DEVICE;
 687                 schedule_work(&usb3->role_work);
 688         } else {
 689                 usb3_set_mode(usb3, host);
 690         }
 691 }
 692
 693 static void usb3_vbus_out(struct renesas_usb3 *usb3, bool enable)
 694 {
 695         if (enable)
 696                 usb3_set_bit(usb3, DRD_CON_VBOUT, USB3_DRD_CON);
 697         else
 698                 usb3_clear_bit(usb3, DRD_CON_VBOUT, USB3_DRD_CON);
 699 }
 700
 701 static void usb3_mode_config(struct renesas_usb3 *usb3, bool host, bool a_dev)
 702 {
 703         unsigned long flags;
 704
 705         spin_lock_irqsave(&usb3->lock, flags);
 706         if (!usb3->role_sw_by_connector ||
 707             usb3->connection_state != USB_ROLE_NONE) {
 708                 usb3_set_mode_by_role_sw(usb3, host);
 709                 usb3_vbus_out(usb3, a_dev);
 710         }
 711         /* for A-Peripheral or forced B-device mode */
 712         if ((!host && a_dev) || usb3->start_to_connect)
 713                 usb3_connect(usb3);
 714         spin_unlock_irqrestore(&usb3->lock, flags);
 715 }
 716
 717 static bool usb3_is_a_device(struct renesas_usb3 *usb3)
 718 {
 719         return !(usb3_read(usb3, USB3_USB_OTG_STA) & USB_OTG_IDMON);
 720 }
 721
 722 static void usb3_check_id(struct renesas_usb3 *usb3)
 723 {
 724         usb3->extcon_host = usb3_is_a_device(usb3);
 725
 726         if ((!usb3->role_sw_by_connector && usb3->extcon_host &&
 727              !usb3->forced_b_device) || usb3->connection_state == USB_ROLE_HOST)
 728                 usb3_mode_config(usb3, true, true);
 729         else
 730                 usb3_mode_config(usb3, false, false);
 731
 732         schedule_work(&usb3->extcon_work);
 733 }
 734
 735 static void renesas_usb3_init_controller(struct renesas_usb3 *usb3)
 736 {
 737         usb3_init_axi_bridge(usb3);
 738         usb3_init_epc_registers(usb3);
 739         usb3_set_bit(usb3, USB_COM_CON_PN_WDATAIF_NL |
 740                      USB_COM_CON_PN_RDATAIF_NL | USB_COM_CON_PN_LSTTR_PP,
 741                      USB3_USB_COM_CON);
 742         usb3_write(usb3, USB_OTG_IDMON, USB3_USB_OTG_INT_STA);
 743         usb3_write(usb3, USB_OTG_IDMON, USB3_USB_OTG_INT_ENA);
 744
 745         usb3_check_id(usb3);
 746         usb3_check_vbus(usb3);
 747 }
 748
 749 static void renesas_usb3_stop_controller(struct renesas_usb3 *usb3)
 750 {
 751         usb3_disconnect(usb3);
 752         usb3_write(usb3, 0, USB3_P0_INT_ENA);
 753         usb3_write(usb3, 0, USB3_USB_OTG_INT_ENA);
 754         usb3_write(usb3, 0, USB3_USB_INT_ENA_1);
 755         usb3_write(usb3, 0, USB3_USB_INT_ENA_2);
 756         usb3_write(usb3, 0, USB3_AXI_INT_ENA);
 757 }
 758
 759 static void usb3_irq_epc_int_1_pll_wakeup(struct renesas_usb3 *usb3)
 760 {
 761         usb3_disable_irq_1(usb3, USB_INT_1_B3_PLLWKUP);
 762         usb3_clear_bit(usb3, USB30_CON_B3_PLLWAKE, USB3_USB30_CON);
 763         usb3_start_usb3_connection(usb3);
 764 }
 765
 766 static void usb3_irq_epc_int_1_linkup_success(struct renesas_usb3 *usb3)
 767 {
 768         usb3_transition_to_default_state(usb3, true);
 769 }
 770
 771 static void usb3_irq_epc_int_1_resume(struct renesas_usb3 *usb3)
 772 {
 773         usb3_disable_irq_1(usb3, USB_INT_1_B2_RSUM);
 774         usb3_start_usb2_connection(usb3);
 775         usb3_transition_to_default_state(usb3, false);
 776 }
 777
 778 static void usb3_irq_epc_int_1_suspend(struct renesas_usb3 *usb3)
 779 {
 780         usb3_disable_irq_1(usb3, USB_INT_1_B2_SPND);
 781
 782         if (usb3->gadget.speed != USB_SPEED_UNKNOWN &&
 783             usb3->gadget.state != USB_STATE_NOTATTACHED) {
 784                 if (usb3->driver && usb3->driver->suspend)
 785                         usb3->driver->suspend(&usb3->gadget);
 786                 usb_gadget_set_state(&usb3->gadget, USB_STATE_SUSPENDED);
 787         }
 788 }
 789
 790 static void usb3_irq_epc_int_1_disable(struct renesas_usb3 *usb3)
 791 {
 792         usb3_stop_usb3_connection(usb3);
 793         if (usb3_wakeup_usb2_phy(usb3))
 794                 usb3_irq_epc_int_1_resume(usb3);
 795 }
 796
 797 static void usb3_irq_epc_int_1_bus_reset(struct renesas_usb3 *usb3)
 798 {
 799         usb3_reset_epc(usb3);
 800         if (usb3->disabled_count < 3)
 801                 usb3_start_usb3_connection(usb3);
 802         else
 803                 usb3_start_usb2_connection(usb3);
 804 }
 805
 806 static void usb3_irq_epc_int_1_vbus_change(struct renesas_usb3 *usb3)
 807 {
 808         usb3_check_vbus(usb3);
 809 }
 810
 811 static void usb3_irq_epc_int_1_hot_reset(struct renesas_usb3 *usb3)
 812 {
 813         usb3_reset_epc(usb3);
 814         usb3_set_bit(usb3, USB_COM_CON_EP0_EN, USB3_USB_COM_CON);
 815
 816         /* This bit shall be set within 12ms from the start of HotReset */
 817         usb3_set_bit(usb3, USB30_CON_B3_HOTRST_CMP, USB3_USB30_CON);
 818 }
 819
 820 static void usb3_irq_epc_int_1_warm_reset(struct renesas_usb3 *usb3)
 821 {
 822         usb3_reset_epc(usb3);
 823         usb3_set_bit(usb3, USB_COM_CON_EP0_EN, USB3_USB_COM_CON);
 824
 825         usb3_start_operation_for_usb3(usb3);
 826         usb3_enable_irq_1(usb3, USB_INT_1_SPEED);
 827 }
 828
 829 static void usb3_irq_epc_int_1_speed(struct renesas_usb3 *usb3)
 830 {
 831         u32 speed = usb3_read(usb3, USB3_USB_STA) & USB_STA_SPEED_MASK;
 832
 833         switch (speed) {
 834         case USB_STA_SPEED_SS:
 835                 usb3->gadget.speed = USB_SPEED_SUPER;
 836                 usb3->gadget.ep0->maxpacket = USB3_EP0_SS_MAX_PACKET_SIZE;
 837                 break;
 838         case USB_STA_SPEED_HS:
 839                 usb3->gadget.speed = USB_SPEED_HIGH;
 840                 usb3->gadget.ep0->maxpacket = USB3_EP0_HSFS_MAX_PACKET_SIZE;
 841                 break;
 842         case USB_STA_SPEED_FS:
 843                 usb3->gadget.speed = USB_SPEED_FULL;
 844                 usb3->gadget.ep0->maxpacket = USB3_EP0_HSFS_MAX_PACKET_SIZE;
 845                 break;
 846         default:
 847                 usb3->gadget.speed = USB_SPEED_UNKNOWN;
 848                 break;
 849         }
 850 }
 851
 852 static void usb3_irq_epc_int_1(struct renesas_usb3 *usb3, u32 int_sta_1)
 853 {
 854         if (int_sta_1 & USB_INT_1_B3_PLLWKUP)
 855                 usb3_irq_epc_int_1_pll_wakeup(usb3);
 856
 857         if (int_sta_1 & USB_INT_1_B3_LUPSUCS)
 858                 usb3_irq_epc_int_1_linkup_success(usb3);
 859
 860         if (int_sta_1 & USB_INT_1_B3_HOTRST)
 861                 usb3_irq_epc_int_1_hot_reset(usb3);
 862
 863         if (int_sta_1 & USB_INT_1_B3_WRMRST)
 864                 usb3_irq_epc_int_1_warm_reset(usb3);
 865
 866         if (int_sta_1 & USB_INT_1_B3_DISABLE)
 867                 usb3_irq_epc_int_1_disable(usb3);
 868
 869         if (int_sta_1 & USB_INT_1_B2_USBRST)
 870                 usb3_irq_epc_int_1_bus_reset(usb3);
 871
 872         if (int_sta_1 & USB_INT_1_B2_RSUM)
 873                 usb3_irq_epc_int_1_resume(usb3);
 874
 875         if (int_sta_1 & USB_INT_1_B2_SPND)
 876                 usb3_irq_epc_int_1_suspend(usb3);
 877
 878         if (int_sta_1 & USB_INT_1_SPEED)
 879                 usb3_irq_epc_int_1_speed(usb3);
 880
 881         if (int_sta_1 & USB_INT_1_VBUS_CNG)
 882                 usb3_irq_epc_int_1_vbus_change(usb3);
 883 }
 884
 885 static struct renesas_usb3_request *__usb3_get_request(struct renesas_usb3_ep
 886                                                        *usb3_ep)
 887 {
 888         return list_first_entry_or_null(&usb3_ep->queue,
 889                                         struct renesas_usb3_request, queue);
 890 }
 891
 892 static struct renesas_usb3_request *usb3_get_request(struct renesas_usb3_ep
 893                                                      *usb3_ep)
 894 {
 895         struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
 896         struct renesas_usb3_request *usb3_req;
 897         unsigned long flags;
 898
 899         spin_lock_irqsave(&usb3->lock, flags);
 900         usb3_req = __usb3_get_request(usb3_ep);
 901         spin_unlock_irqrestore(&usb3->lock, flags);
 902
 903         return usb3_req;
 904 }
 905
 906 static void __usb3_request_done(struct renesas_usb3_ep *usb3_ep,
 907                                 struct renesas_usb3_request *usb3_req,
 908                                 int status)
 909 {
 910         struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
 911
 912         dev_dbg(usb3_to_dev(usb3), "giveback: ep%2d, %u, %u, %d\n",
 913                 usb3_ep->num, usb3_req->req.length, usb3_req->req.actual,
 914                 status);
 915         usb3_req->req.status = status;
 916         usb3_ep->started = false;
 917         list_del_init(&usb3_req->queue);
 918         spin_unlock(&usb3->lock);
 919         usb_gadget_giveback_request(&usb3_ep->ep, &usb3_req->req);
 920         spin_lock(&usb3->lock);
 921 }
 922
 923 static void usb3_request_done(struct renesas_usb3_ep *usb3_ep,
 924                               struct renesas_usb3_request *usb3_req, int status)
 925 {
 926         struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
 927         unsigned long flags;
 928
 929         spin_lock_irqsave(&usb3->lock, flags);
 930         __usb3_request_done(usb3_ep, usb3_req, status);
 931         spin_unlock_irqrestore(&usb3->lock, flags);
 932 }
 933
 934 static void usb3_irq_epc_pipe0_status_end(struct renesas_usb3 *usb3)
 935 {
 936         struct renesas_usb3_ep *usb3_ep = usb3_get_ep(usb3, 0);
 937         struct renesas_usb3_request *usb3_req = usb3_get_request(usb3_ep);
 938
 939         if (usb3_req)
 940                 usb3_request_done(usb3_ep, usb3_req, 0);
 941         if (usb3->test_mode)
 942                 usb3_set_test_mode(usb3);
 943 }
 944
 945 static void usb3_get_setup_data(struct renesas_usb3 *usb3,
 946                                 struct usb_ctrlrequest *ctrl)
 947 {
 948         struct renesas_usb3_ep *usb3_ep = usb3_get_ep(usb3, 0);
 949         u32 *data = (u32 *)ctrl;
 950
 951         *data++ = usb3_read(usb3, USB3_STUP_DAT_0);
 952         *data = usb3_read(usb3, USB3_STUP_DAT_1);
 953
 954         /* update this driver's flag */
 955         usb3_ep->dir_in = !!(ctrl->bRequestType & USB_DIR_IN);
 956 }
 957
 958 static void usb3_set_p0_con_update_res(struct renesas_usb3 *usb3, u32 res)
 959 {
 960         u32 val = usb3_read(usb3, USB3_P0_CON);
 961
 962         val &= ~(P0_CON_ST_RES_MASK | P0_CON_OT_RES_MASK | P0_CON_IN_RES_MASK);
 963         val |= res | P0_CON_RES_WEN;
 964         usb3_write(usb3, val, USB3_P0_CON);
 965 }
 966
 967 static void usb3_set_p0_con_for_ctrl_read_data(struct renesas_usb3 *usb3)
 968 {
 969         usb3_set_p0_con_update_res(usb3, P0_CON_ST_RES_FORCE_NRDY |
 970                                    P0_CON_OT_RES_FORCE_STALL |
 971                                    P0_CON_IN_RES_NORMAL);
 972 }
 973
 974 static void usb3_set_p0_con_for_ctrl_read_status(struct renesas_usb3 *usb3)
 975 {
 976         usb3_set_p0_con_update_res(usb3, P0_CON_ST_RES_NORMAL |
 977                                    P0_CON_OT_RES_FORCE_STALL |
 978                                    P0_CON_IN_RES_NORMAL);
 979 }
 980
 981 static void usb3_set_p0_con_for_ctrl_write_data(struct renesas_usb3 *usb3)
 982 {
 983         usb3_set_p0_con_update_res(usb3, P0_CON_ST_RES_FORCE_NRDY |
 984                                    P0_CON_OT_RES_NORMAL |
 985                                    P0_CON_IN_RES_FORCE_STALL);
 986 }
 987
 988 static void usb3_set_p0_con_for_ctrl_write_status(struct renesas_usb3 *usb3)
 989 {
 990         usb3_set_p0_con_update_res(usb3, P0_CON_ST_RES_NORMAL |
 991                                    P0_CON_OT_RES_NORMAL |
 992                                    P0_CON_IN_RES_FORCE_STALL);
 993 }
 994
 995 static void usb3_set_p0_con_for_no_data(struct renesas_usb3 *usb3)
 996 {
 997         usb3_set_p0_con_update_res(usb3, P0_CON_ST_RES_NORMAL |
 998                                    P0_CON_OT_RES_FORCE_STALL |
 999                                    P0_CON_IN_RES_FORCE_STALL);
1000 }
1001
1002 static void usb3_set_p0_con_stall(struct renesas_usb3 *usb3)
1003 {
1004         usb3_set_p0_con_update_res(usb3, P0_CON_ST_RES_FORCE_STALL |
1005                                    P0_CON_OT_RES_FORCE_STALL |
1006                                    P0_CON_IN_RES_FORCE_STALL);
1007 }
1008
1009 static void usb3_set_p0_con_stop(struct renesas_usb3 *usb3)
1010 {
1011         usb3_set_p0_con_update_res(usb3, P0_CON_ST_RES_FORCE_NRDY |
1012                                    P0_CON_OT_RES_FORCE_NRDY |
1013                                    P0_CON_IN_RES_FORCE_NRDY);
1014 }
1015
1016 static int usb3_pn_change(struct renesas_usb3 *usb3, int num)
1017 {
1018         if (num == 0 || num > usb3->num_usb3_eps)
1019                 return -ENXIO;
1020
1021         usb3_write(usb3, num, USB3_PIPE_COM);
1022
1023         return 0;
1024 }
1025
1026 static void usb3_set_pn_con_update_res(struct renesas_usb3 *usb3, u32 res)
1027 {
1028         u32 val = usb3_read(usb3, USB3_PN_CON);
1029
1030         val &= ~PN_CON_RES_MASK;
1031         val |= res & PN_CON_RES_MASK;
1032         val |= PN_CON_RES_WEN;
1033         usb3_write(usb3, val, USB3_PN_CON);
1034 }
1035
1036 static void usb3_pn_start(struct renesas_usb3 *usb3)
1037 {
1038         usb3_set_pn_con_update_res(usb3, PN_CON_RES_NORMAL);
1039 }
1040
1041 static void usb3_pn_stop(struct renesas_usb3 *usb3)
1042 {
1043         usb3_set_pn_con_update_res(usb3, PN_CON_RES_FORCE_NRDY);
1044 }
1045
1046 static void usb3_pn_stall(struct renesas_usb3 *usb3)
1047 {
1048         usb3_set_pn_con_update_res(usb3, PN_CON_RES_FORCE_STALL);
1049 }
1050
1051 static int usb3_pn_con_clear(struct renesas_usb3 *usb3)
1052 {
1053         usb3_set_bit(usb3, PN_CON_CLR, USB3_PN_CON);
1054
1055         return usb3_wait(usb3, USB3_PN_CON, PN_CON_CLR, 0);
1056 }
1057
1058 static bool usb3_is_transfer_complete(struct renesas_usb3_ep *usb3_ep,
1059                                       struct renesas_usb3_request *usb3_req)
1060 {
1061         struct usb_request *req = &usb3_req->req;
1062
1063         if ((!req->zero && req->actual == req->length) ||
1064             (req->actual % usb3_ep->ep.maxpacket) || (req->length == 0))
1065                 return true;
1066         else
1067                 return false;
1068 }
1069
1070 static int usb3_wait_pipe_status(struct renesas_usb3_ep *usb3_ep, u32 mask)
1071 {
1072         struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
1073         u32 sta_reg = usb3_ep->num ? USB3_PN_STA : USB3_P0_STA;
1074
1075         return usb3_wait(usb3, sta_reg, mask, mask);
1076 }
1077
1078 static void usb3_set_px_con_send(struct renesas_usb3_ep *usb3_ep, int bytes,
1079                                  bool last)
1080 {
1081         struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
1082         u32 con_reg = usb3_ep->num ? USB3_PN_CON : USB3_P0_CON;
1083         u32 val = usb3_read(usb3, con_reg);
1084
1085         val |= PX_CON_SEND | PX_CON_BYTE_EN_BYTES(bytes);
1086         val |= (usb3_ep->num && last) ? PN_CON_LAST : 0;
1087         usb3_write(usb3, val, con_reg);
1088 }
1089
1090 static int usb3_write_pipe(struct renesas_usb3_ep *usb3_ep,
1091                            struct renesas_usb3_request *usb3_req,
1092                            u32 fifo_reg)
1093 {
1094         struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
1095         int i;
1096         int len = min_t(unsigned, usb3_req->req.length - usb3_req->req.actual,
1097                         usb3_ep->ep.maxpacket);
1098         u8 *buf = usb3_req->req.buf + usb3_req->req.actual;
1099         u32 tmp = 0;
1100         bool is_last = !len ? true : false;
1101
1102         if (usb3_wait_pipe_status(usb3_ep, PX_STA_BUFSTS) < 0)
1103                 return -EBUSY;
1104
1105         /* Update gadget driver parameter */
1106         usb3_req->req.actual += len;
1107
1108         /* Write data to the register */
1109         if (len >= 4) {
1110                 iowrite32_rep(usb3->reg + fifo_reg, buf, len / 4);
1111                 buf += (len / 4) * 4;
1112                 len %= 4;       /* update len to use usb3_set_pX_con_send() */
1113         }
1114
1115         if (len) {
1116                 for (i = 0; i < len; i++)
1117                         tmp |= buf[i] << (8 * i);
1118                 usb3_write(usb3, tmp, fifo_reg);
1119         }
1120
1121         if (!is_last)
1122                 is_last = usb3_is_transfer_complete(usb3_ep, usb3_req);
1123         /* Send the data */
1124         usb3_set_px_con_send(usb3_ep, len, is_last);
1125
1126         return is_last ? 0 : -EAGAIN;
1127 }
1128
1129 static u32 usb3_get_received_length(struct renesas_usb3_ep *usb3_ep)
1130 {
1131         struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
1132         u32 lng_reg = usb3_ep->num ? USB3_PN_LNG : USB3_P0_LNG;
1133
1134         return usb3_read(usb3, lng_reg);
1135 }
1136
1137 static int usb3_read_pipe(struct renesas_usb3_ep *usb3_ep,
1138                           struct renesas_usb3_request *usb3_req, u32 fifo_reg)
1139 {
1140         struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
1141         int i;
1142         int len = min_t(unsigned, usb3_req->req.length - usb3_req->req.actual,
1143                         usb3_get_received_length(usb3_ep));
1144         u8 *buf = usb3_req->req.buf + usb3_req->req.actual;
1145         u32 tmp = 0;
1146
1147         if (!len)
1148                 return 0;
1149
1150         /* Update gadget driver parameter */
1151         usb3_req->req.actual += len;
1152
1153         /* Read data from the register */
1154         if (len >= 4) {
1155                 ioread32_rep(usb3->reg + fifo_reg, buf, len / 4);
1156                 buf += (len / 4) * 4;
1157                 len %= 4;
1158         }
1159
1160         if (len) {
1161                 tmp = usb3_read(usb3, fifo_reg);
1162                 for (i = 0; i < len; i++)
1163                         buf[i] = (tmp >> (8 * i)) & 0xff;
1164         }
1165
1166         return usb3_is_transfer_complete(usb3_ep, usb3_req) ? 0 : -EAGAIN;
1167 }
1168
1169 static void usb3_set_status_stage(struct renesas_usb3_ep *usb3_ep,
1170                                   struct renesas_usb3_request *usb3_req)
1171 {
1172         struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
1173
1174         if (usb3_ep->dir_in) {
1175                 usb3_set_p0_con_for_ctrl_read_status(usb3);
1176         } else {
1177                 if (!usb3_req->req.length)
1178                         usb3_set_p0_con_for_no_data(usb3);
1179                 else
1180                         usb3_set_p0_con_for_ctrl_write_status(usb3);
1181         }
1182 }
1183
1184 static void usb3_p0_xfer(struct renesas_usb3_ep *usb3_ep,
1185                          struct renesas_usb3_request *usb3_req)
1186 {
1187         int ret;
1188
1189         if (usb3_ep->dir_in)
1190                 ret = usb3_write_pipe(usb3_ep, usb3_req, USB3_P0_WRITE);
1191         else
1192                 ret = usb3_read_pipe(usb3_ep, usb3_req, USB3_P0_READ);
1193
1194         if (!ret)
1195                 usb3_set_status_stage(usb3_ep, usb3_req);
1196 }
1197
1198 static void usb3_start_pipe0(struct renesas_usb3_ep *usb3_ep,
1199                              struct renesas_usb3_request *usb3_req)
1200 {
1201         struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
1202
1203         if (usb3_ep->started)
1204                 return;
1205
1206         usb3_ep->started = true;
1207
1208         if (usb3_ep->dir_in) {
1209                 usb3_set_bit(usb3, P0_MOD_DIR, USB3_P0_MOD);
1210                 usb3_set_p0_con_for_ctrl_read_data(usb3);
1211         } else {
1212                 usb3_clear_bit(usb3, P0_MOD_DIR, USB3_P0_MOD);
1213                 if (usb3_req->req.length)
1214                         usb3_set_p0_con_for_ctrl_write_data(usb3);
1215         }
1216
1217         usb3_p0_xfer(usb3_ep, usb3_req);
1218 }
1219
1220 static void usb3_enable_dma_pipen(struct renesas_usb3 *usb3)
1221 {
1222         usb3_set_bit(usb3, PN_CON_DATAIF_EN, USB3_PN_CON);
1223 }
1224
1225 static void usb3_disable_dma_pipen(struct renesas_usb3 *usb3)
1226 {
1227         usb3_clear_bit(usb3, PN_CON_DATAIF_EN, USB3_PN_CON);
1228 }
1229
1230 static void usb3_enable_dma_irq(struct renesas_usb3 *usb3, int num)
1231 {
1232         usb3_set_bit(usb3, DMA_INT(num), USB3_DMA_INT_ENA);
1233 }
1234
1235 static void usb3_disable_dma_irq(struct renesas_usb3 *usb3, int num)
1236 {
1237         usb3_clear_bit(usb3, DMA_INT(num), USB3_DMA_INT_ENA);
1238 }
1239
1240 static u32 usb3_dma_mps_to_prd_word1(struct renesas_usb3_ep *usb3_ep)
1241 {
1242         switch (usb3_ep->ep.maxpacket) {
1243         case 8:
1244                 return USB3_PRD1_MPS_8;
1245         case 16:
1246                 return USB3_PRD1_MPS_16;
1247         case 32:
1248                 return USB3_PRD1_MPS_32;
1249         case 64:
1250                 return USB3_PRD1_MPS_64;
1251         case 512:
1252                 return USB3_PRD1_MPS_512;
1253         case 1024:
1254                 return USB3_PRD1_MPS_1024;
1255         default:
1256                 return USB3_PRD1_MPS_RESERVED;
1257         }
1258 }
1259
1260 static bool usb3_dma_get_setting_area(struct renesas_usb3_ep *usb3_ep,
1261                                       struct renesas_usb3_request *usb3_req)
1262 {
1263         struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
1264         struct renesas_usb3_dma *dma;
1265         int i;
1266         bool ret = false;
1267
1268         if (usb3_req->req.length > USB3_DMA_MAX_XFER_SIZE_ALL_PRDS) {
1269                 dev_dbg(usb3_to_dev(usb3), "%s: the length is too big (%d)\n",
1270                         __func__, usb3_req->req.length);
1271                 return false;
1272         }
1273
1274         /* The driver doesn't handle zero-length packet via dmac */
1275         if (!usb3_req->req.length)
1276                 return false;
1277
1278         if (usb3_dma_mps_to_prd_word1(usb3_ep) == USB3_PRD1_MPS_RESERVED)
1279                 return false;
1280
1281         usb3_for_each_dma(usb3, dma, i) {
1282                 if (dma->used)
1283                         continue;
1284
1285                 if (usb_gadget_map_request(&usb3->gadget, &usb3_req->req,
1286                                            usb3_ep->dir_in) < 0)
1287                         break;
1288
1289                 dma->used = true;
1290                 usb3_ep->dma = dma;
1291                 ret = true;
1292                 break;
1293         }
1294
1295         return ret;
1296 }
1297
1298 static void usb3_dma_put_setting_area(struct renesas_usb3_ep *usb3_ep,
1299                                       struct renesas_usb3_request *usb3_req)
1300 {
1301         struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
1302         int i;
1303         struct renesas_usb3_dma *dma;
1304
1305         usb3_for_each_dma(usb3, dma, i) {
1306                 if (usb3_ep->dma == dma) {
1307                         usb_gadget_unmap_request(&usb3->gadget, &usb3_req->req,
1308                                                  usb3_ep->dir_in);
1309                         dma->used = false;
1310                         usb3_ep->dma = NULL;
1311                         break;
1312                 }
1313         }
1314 }
1315
1316 static void usb3_dma_fill_prd(struct renesas_usb3_ep *usb3_ep,
1317                               struct renesas_usb3_request *usb3_req)
1318 {
1319         struct renesas_usb3_prd *cur_prd = usb3_ep->dma->prd;
1320         u32 remain = usb3_req->req.length;
1321         u32 dma = usb3_req->req.dma;
1322         u32 len;
1323         int i = 0;
1324
1325         do {
1326                 len = min_t(u32, remain, USB3_DMA_MAX_XFER_SIZE) &
1327                             USB3_PRD1_SIZE_MASK;
1328                 cur_prd->word1 = usb3_dma_mps_to_prd_word1(usb3_ep) |
1329                                  USB3_PRD1_B_INC | len;
1330                 cur_prd->bap = dma;
1331                 remain -= len;
1332                 dma += len;
1333                 if (!remain || (i + 1) < USB3_DMA_NUM_PRD_ENTRIES)
1334                         break;
1335
1336                 cur_prd++;
1337                 i++;
1338         } while (1);
1339
1340         cur_prd->word1 |= USB3_PRD1_E | USB3_PRD1_INT;
1341         if (usb3_ep->dir_in)
1342                 cur_prd->word1 |= USB3_PRD1_LST;
1343 }
1344
1345 static void usb3_dma_kick_prd(struct renesas_usb3_ep *usb3_ep)
1346 {
1347         struct renesas_usb3_dma *dma = usb3_ep->dma;
1348         struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
1349         u32 dma_con = DMA_COM_PIPE_NO(usb3_ep->num) | DMA_CON_PRD_EN;
1350
1351         if (usb3_ep->dir_in)
1352                 dma_con |= DMA_CON_PIPE_DIR;
1353
1354         wmb();  /* prd entries should be in system memory here */
1355
1356         usb3_write(usb3, 1 << usb3_ep->num, USB3_DMA_INT_STA);
1357         usb3_write(usb3, AXI_INT_PRDEN_CLR_STA(dma->num) |
1358                    AXI_INT_PRDERR_STA(dma->num), USB3_AXI_INT_STA);
1359
1360         usb3_write(usb3, dma->prd_dma, USB3_DMA_CH0_PRD_ADR(dma->num));
1361         usb3_write(usb3, dma_con, USB3_DMA_CH0_CON(dma->num));
1362         usb3_enable_dma_irq(usb3, usb3_ep->num);
1363 }
1364
1365 static void usb3_dma_stop_prd(struct renesas_usb3_ep *usb3_ep)
1366 {
1367         struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
1368         struct renesas_usb3_dma *dma = usb3_ep->dma;
1369
1370         usb3_disable_dma_irq(usb3, usb3_ep->num);
1371         usb3_write(usb3, 0, USB3_DMA_CH0_CON(dma->num));
1372 }
1373
1374 static int usb3_dma_update_status(struct renesas_usb3_ep *usb3_ep,
1375                                   struct renesas_usb3_request *usb3_req)
1376 {
1377         struct renesas_usb3_prd *cur_prd = usb3_ep->dma->prd;
1378         struct usb_request *req = &usb3_req->req;
1379         u32 remain, len;
1380         int i = 0;
1381         int status = 0;
1382
1383         rmb();  /* The controller updated prd entries */
1384
1385         do {
1386                 if (cur_prd->word1 & USB3_PRD1_D)
1387                         status = -EIO;
1388                 if (cur_prd->word1 & USB3_PRD1_E)
1389                         len = req->length % USB3_DMA_MAX_XFER_SIZE;
1390                 else
1391                         len = USB3_DMA_MAX_XFER_SIZE;
1392                 remain = cur_prd->word1 & USB3_PRD1_SIZE_MASK;
1393                 req->actual += len - remain;
1394
1395                 if (cur_prd->word1 & USB3_PRD1_E ||
1396                     (i + 1) < USB3_DMA_NUM_PRD_ENTRIES)
1397                         break;
1398
1399                 cur_prd++;
1400                 i++;
1401         } while (1);
1402
1403         return status;
1404 }
1405
1406 static bool usb3_dma_try_start(struct renesas_usb3_ep *usb3_ep,
1407                                struct renesas_usb3_request *usb3_req)
1408 {
1409         struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
1410
1411         if (!use_dma)
1412                 return false;
1413
1414         if (usb3_dma_get_setting_area(usb3_ep, usb3_req)) {
1415                 usb3_pn_stop(usb3);
1416                 usb3_enable_dma_pipen(usb3);
1417                 usb3_dma_fill_prd(usb3_ep, usb3_req);
1418                 usb3_dma_kick_prd(usb3_ep);
1419                 usb3_pn_start(usb3);
1420                 return true;
1421         }
1422
1423         return false;
1424 }
1425
1426 static int usb3_dma_try_stop(struct renesas_usb3_ep *usb3_ep,
1427                              struct renesas_usb3_request *usb3_req)
1428 {
1429         struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
1430         unsigned long flags;
1431         int status = 0;
1432
1433         spin_lock_irqsave(&usb3->lock, flags);
1434         if (!usb3_ep->dma)
1435                 goto out;
1436
1437         if (!usb3_pn_change(usb3, usb3_ep->num))
1438                 usb3_disable_dma_pipen(usb3);
1439         usb3_dma_stop_prd(usb3_ep);
1440         status = usb3_dma_update_status(usb3_ep, usb3_req);
1441         usb3_dma_put_setting_area(usb3_ep, usb3_req);
1442
1443 out:
1444         spin_unlock_irqrestore(&usb3->lock, flags);
1445         return status;
1446 }
1447
1448 static int renesas_usb3_dma_free_prd(struct renesas_usb3 *usb3,
1449                                      struct device *dev)
1450 {
1451         int i;
1452         struct renesas_usb3_dma *dma;
1453
1454         usb3_for_each_dma(usb3, dma, i) {
1455                 if (dma->prd) {
1456                         dma_free_coherent(dev, USB3_DMA_PRD_SIZE,
1457                                           dma->prd, dma->prd_dma);
1458                         dma->prd = NULL;
1459                 }
1460         }
1461
1462         return 0;
1463 }
1464
1465 static int renesas_usb3_dma_alloc_prd(struct renesas_usb3 *usb3,
1466                                       struct device *dev)
1467 {
1468         int i;
1469         struct renesas_usb3_dma *dma;
1470
1471         if (!use_dma)
1472                 return 0;
1473
1474         usb3_for_each_dma(usb3, dma, i) {
1475                 dma->prd = dma_alloc_coherent(dev, USB3_DMA_PRD_SIZE,
1476                                               &dma->prd_dma, GFP_KERNEL);
1477                 if (!dma->prd) {
1478                         renesas_usb3_dma_free_prd(usb3, dev);
1479                         return -ENOMEM;
1480                 }
1481                 dma->num = i + 1;
1482         }
1483
1484         return 0;
1485 }
1486
1487 static void usb3_start_pipen(struct renesas_usb3_ep *usb3_ep,
1488                              struct renesas_usb3_request *usb3_req)
1489 {
1490         struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
1491         struct renesas_usb3_request *usb3_req_first = usb3_get_request(usb3_ep);
1492         unsigned long flags;
1493         int ret = -EAGAIN;
1494         u32 enable_bits = 0;
1495
1496         spin_lock_irqsave(&usb3->lock, flags);
1497         if (usb3_ep->halt || usb3_ep->started)
1498                 goto out;
1499         if (usb3_req != usb3_req_first)
1500                 goto out;
1501
1502         if (usb3_pn_change(usb3, usb3_ep->num) < 0)
1503                 goto out;
1504
1505         usb3_ep->started = true;
1506
1507         if (usb3_dma_try_start(usb3_ep, usb3_req))
1508                 goto out;
1509
1510         usb3_pn_start(usb3);
1511
1512         if (usb3_ep->dir_in) {
1513                 ret = usb3_write_pipe(usb3_ep, usb3_req, USB3_PN_WRITE);
1514                 enable_bits |= PN_INT_LSTTR;
1515         }
1516
1517         if (ret < 0)
1518                 enable_bits |= PN_INT_BFRDY;
1519
1520         if (enable_bits) {
1521                 usb3_set_bit(usb3, enable_bits, USB3_PN_INT_ENA);
1522                 usb3_enable_pipe_irq(usb3, usb3_ep->num);
1523         }
1524 out:
1525         spin_unlock_irqrestore(&usb3->lock, flags);
1526 }
1527
1528 static int renesas_usb3_ep_queue(struct usb_ep *_ep, struct usb_request *_req,
1529                                  gfp_t gfp_flags)
1530 {
1531         struct renesas_usb3_ep *usb3_ep = usb_ep_to_usb3_ep(_ep);
1532         struct renesas_usb3_request *usb3_req = usb_req_to_usb3_req(_req);
1533         struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
1534         unsigned long flags;
1535
1536         dev_dbg(usb3_to_dev(usb3), "ep_queue: ep%2d, %u\n", usb3_ep->num,
1537                 _req->length);
1538
1539         _req->status = -EINPROGRESS;
1540         _req->actual = 0;
1541         spin_lock_irqsave(&usb3->lock, flags);
1542         list_add_tail(&usb3_req->queue, &usb3_ep->queue);
1543         spin_unlock_irqrestore(&usb3->lock, flags);
1544
1545         if (!usb3_ep->num)
1546                 usb3_start_pipe0(usb3_ep, usb3_req);
1547         else
1548                 usb3_start_pipen(usb3_ep, usb3_req);
1549
1550         return 0;
1551 }
1552
1553 static void usb3_set_device_address(struct renesas_usb3 *usb3, u16 addr)
1554 {
1555         /* DEV_ADDR bit field is cleared by WarmReset, HotReset and BusReset */
1556         usb3_set_bit(usb3, USB_COM_CON_DEV_ADDR(addr), USB3_USB_COM_CON);
1557 }
1558
1559 static bool usb3_std_req_set_address(struct renesas_usb3 *usb3,
1560                                      struct usb_ctrlrequest *ctrl)
1561 {
1562         if (le16_to_cpu(ctrl->wValue) >= 128)
1563                 return true;    /* stall */
1564
1565         usb3_set_device_address(usb3, le16_to_cpu(ctrl->wValue));
1566         usb3_set_p0_con_for_no_data(usb3);
1567
1568         return false;
1569 }
1570
1571 static void usb3_pipe0_internal_xfer(struct renesas_usb3 *usb3,
1572                                      void *tx_data, size_t len,
1573                                      void (*complete)(struct usb_ep *ep,
1574                                                       struct usb_request *req))
1575 {
1576         struct renesas_usb3_ep *usb3_ep = usb3_get_ep(usb3, 0);
1577
1578         if (tx_data)
1579                 memcpy(usb3->ep0_buf, tx_data,
1580                        min_t(size_t, len, USB3_EP0_BUF_SIZE));
1581
1582         usb3->ep0_req->buf = &usb3->ep0_buf;
1583         usb3->ep0_req->length = len;
1584         usb3->ep0_req->complete = complete;
1585         renesas_usb3_ep_queue(&usb3_ep->ep, usb3->ep0_req, GFP_ATOMIC);
1586 }
1587
1588 static void usb3_pipe0_get_status_completion(struct usb_ep *ep,
1589                                              struct usb_request *req)
1590 {
1591 }
1592
1593 static bool usb3_std_req_get_status(struct renesas_usb3 *usb3,
1594                                     struct usb_ctrlrequest *ctrl)
1595 {
1596         bool stall = false;
1597         struct renesas_usb3_ep *usb3_ep;
1598         int num;
1599         u16 status = 0;
1600         __le16 tx_data;
1601
1602         switch (ctrl->bRequestType & USB_RECIP_MASK) {
1603         case USB_RECIP_DEVICE:
1604                 if (usb3->gadget.is_selfpowered)
1605                         status |= 1 << USB_DEVICE_SELF_POWERED;
1606                 if (usb3->gadget.speed == USB_SPEED_SUPER)
1607                         status |= usb3_feature_get_un_enabled(usb3);
1608                 break;
1609         case USB_RECIP_INTERFACE:
1610                 break;
1611         case USB_RECIP_ENDPOINT:
1612                 num = le16_to_cpu(ctrl->wIndex) & USB_ENDPOINT_NUMBER_MASK;
1613                 usb3_ep = usb3_get_ep(usb3, num);
1614                 if (usb3_ep->halt)
1615                         status |= 1 << USB_ENDPOINT_HALT;
1616                 break;
1617         default:
1618                 stall = true;
1619                 break;
1620         }
1621
1622         if (!stall) {
1623                 tx_data = cpu_to_le16(status);
1624                 dev_dbg(usb3_to_dev(usb3), "get_status: req = %p\n",
1625                         usb_req_to_usb3_req(usb3->ep0_req));
1626                 usb3_pipe0_internal_xfer(usb3, &tx_data, sizeof(tx_data),
1627                                          usb3_pipe0_get_status_completion);
1628         }
1629
1630         return stall;
1631 }
1632
1633 static bool usb3_std_req_feature_device(struct renesas_usb3 *usb3,
1634                                         struct usb_ctrlrequest *ctrl, bool set)
1635 {
1636         bool stall = true;
1637         u16 w_value = le16_to_cpu(ctrl->wValue);
1638
1639         switch (w_value) {
1640         case USB_DEVICE_TEST_MODE:
1641                 if (!set)
1642                         break;
1643                 usb3->test_mode = le16_to_cpu(ctrl->wIndex) >> 8;
1644                 stall = false;
1645                 break;
1646         case USB_DEVICE_U1_ENABLE:
1647         case USB_DEVICE_U2_ENABLE:
1648                 if (usb3->gadget.speed != USB_SPEED_SUPER)
1649                         break;
1650                 if (w_value == USB_DEVICE_U1_ENABLE)
1651                         usb3_feature_u1_enable(usb3, set);
1652                 if (w_value == USB_DEVICE_U2_ENABLE)
1653                         usb3_feature_u2_enable(usb3, set);
1654                 stall = false;
1655                 break;
1656         default:
1657                 break;
1658         }
1659
1660         return stall;
1661 }
1662
1663 static int usb3_set_halt_p0(struct renesas_usb3_ep *usb3_ep, bool halt)
1664 {
1665         struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
1666
1667         if (unlikely(usb3_ep->num))
1668                 return -EINVAL;
1669
1670         usb3_ep->halt = halt;
1671         if (halt)
1672                 usb3_set_p0_con_stall(usb3);
1673         else
1674                 usb3_set_p0_con_stop(usb3);
1675
1676         return 0;
1677 }
1678
1679 static int usb3_set_halt_pn(struct renesas_usb3_ep *usb3_ep, bool halt,
1680                             bool is_clear_feature)
1681 {
1682         struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
1683         unsigned long flags;
1684
1685         spin_lock_irqsave(&usb3->lock, flags);
1686         if (!usb3_pn_change(usb3, usb3_ep->num)) {
1687                 usb3_ep->halt = halt;
1688                 if (halt) {
1689                         usb3_pn_stall(usb3);
1690                 } else if (!is_clear_feature || !usb3_ep->wedge) {
1691                         usb3_pn_con_clear(usb3);
1692                         usb3_set_bit(usb3, PN_CON_EN, USB3_PN_CON);
1693                         usb3_pn_stop(usb3);
1694                 }
1695         }
1696         spin_unlock_irqrestore(&usb3->lock, flags);
1697
1698         return 0;
1699 }
1700
1701 static int usb3_set_halt(struct renesas_usb3_ep *usb3_ep, bool halt,
1702                          bool is_clear_feature)
1703 {
1704         int ret = 0;
1705
1706         if (halt && usb3_ep->started)
1707                 return -EAGAIN;
1708
1709         if (usb3_ep->num)
1710                 ret = usb3_set_halt_pn(usb3_ep, halt, is_clear_feature);
1711         else
1712                 ret = usb3_set_halt_p0(usb3_ep, halt);
1713
1714         return ret;
1715 }
1716
1717 static bool usb3_std_req_feature_endpoint(struct renesas_usb3 *usb3,
1718                                           struct usb_ctrlrequest *ctrl,
1719                                           bool set)
1720 {
1721         int num = le16_to_cpu(ctrl->wIndex) & USB_ENDPOINT_NUMBER_MASK;
1722         struct renesas_usb3_ep *usb3_ep;
1723         struct renesas_usb3_request *usb3_req;
1724
1725         if (le16_to_cpu(ctrl->wValue) != USB_ENDPOINT_HALT)
1726                 return true;    /* stall */
1727
1728         usb3_ep = usb3_get_ep(usb3, num);
1729         usb3_set_halt(usb3_ep, set, true);
1730
1731         /* Restarts a queue if clear feature */
1732         if (!set) {
1733                 usb3_ep->started = false;
1734                 usb3_req = usb3_get_request(usb3_ep);
1735                 if (usb3_req)
1736                         usb3_start_pipen(usb3_ep, usb3_req);
1737         }
1738
1739         return false;
1740 }
1741
1742 static bool usb3_std_req_feature(struct renesas_usb3 *usb3,
1743                                  struct usb_ctrlrequest *ctrl, bool set)
1744 {
1745         bool stall = false;
1746
1747         switch (ctrl->bRequestType & USB_RECIP_MASK) {
1748         case USB_RECIP_DEVICE:
1749                 stall = usb3_std_req_feature_device(usb3, ctrl, set);
1750                 break;
1751         case USB_RECIP_INTERFACE:
1752                 break;
1753         case USB_RECIP_ENDPOINT:
1754                 stall = usb3_std_req_feature_endpoint(usb3, ctrl, set);
1755                 break;
1756         default:
1757                 stall = true;
1758                 break;
1759         }
1760
1761         if (!stall)
1762                 usb3_set_p0_con_for_no_data(usb3);
1763
1764         return stall;
1765 }
1766
1767 static void usb3_pipe0_set_sel_completion(struct usb_ep *ep,
1768                                           struct usb_request *req)
1769 {
1770         /* TODO */
1771 }
1772
1773 static bool usb3_std_req_set_sel(struct renesas_usb3 *usb3,
1774                                  struct usb_ctrlrequest *ctrl)
1775 {
1776         u16 w_length = le16_to_cpu(ctrl->wLength);
1777
1778         if (w_length != 6)
1779                 return true;    /* stall */
1780
1781         dev_dbg(usb3_to_dev(usb3), "set_sel: req = %p\n",
1782                 usb_req_to_usb3_req(usb3->ep0_req));
1783         usb3_pipe0_internal_xfer(usb3, NULL, 6, usb3_pipe0_set_sel_completion);
1784
1785         return false;
1786 }
1787
1788 static bool usb3_std_req_set_configuration(struct renesas_usb3 *usb3,
1789                                            struct usb_ctrlrequest *ctrl)
1790 {
1791         if (le16_to_cpu(ctrl->wValue) > 0)
1792                 usb3_set_bit(usb3, USB_COM_CON_CONF, USB3_USB_COM_CON);
1793         else
1794                 usb3_clear_bit(usb3, USB_COM_CON_CONF, USB3_USB_COM_CON);
1795
1796         return false;
1797 }
1798
1799 /**
1800  * usb3_handle_standard_request - handle some standard requests
1801  * @usb3: the renesas_usb3 pointer
1802  * @ctrl: a pointer of setup data
1803  *
1804  * Returns true if this function handled a standard request
1805  */
1806 static bool usb3_handle_standard_request(struct renesas_usb3 *usb3,
1807                                          struct usb_ctrlrequest *ctrl)
1808 {
1809         bool ret = false;
1810         bool stall = false;
1811
1812         if ((ctrl->bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD) {
1813                 switch (ctrl->bRequest) {
1814                 case USB_REQ_SET_ADDRESS:
1815                         stall = usb3_std_req_set_address(usb3, ctrl);
1816                         ret = true;
1817                         break;
1818                 case USB_REQ_GET_STATUS:
1819                         stall = usb3_std_req_get_status(usb3, ctrl);
1820                         ret = true;
1821                         break;
1822                 case USB_REQ_CLEAR_FEATURE:
1823                         stall = usb3_std_req_feature(usb3, ctrl, false);
1824                         ret = true;
1825                         break;
1826                 case USB_REQ_SET_FEATURE:
1827                         stall = usb3_std_req_feature(usb3, ctrl, true);
1828                         ret = true;
1829                         break;
1830                 case USB_REQ_SET_SEL:
1831                         stall = usb3_std_req_set_sel(usb3, ctrl);
1832                         ret = true;
1833                         break;
1834                 case USB_REQ_SET_ISOCH_DELAY:
1835                         /* This hardware doesn't support Isochronous xfer */
1836                         stall = true;
1837                         ret = true;
1838                         break;
1839                 case USB_REQ_SET_CONFIGURATION:
1840                         usb3_std_req_set_configuration(usb3, ctrl);
1841                         break;
1842                 default:
1843                         break;
1844                 }
1845         }
1846
1847         if (stall)
1848                 usb3_set_p0_con_stall(usb3);
1849
1850         return ret;
1851 }
1852
1853 static int usb3_p0_con_clear_buffer(struct renesas_usb3 *usb3)
1854 {
1855         usb3_set_bit(usb3, P0_CON_BCLR, USB3_P0_CON);
1856
1857         return usb3_wait(usb3, USB3_P0_CON, P0_CON_BCLR, 0);
1858 }
1859
1860 static void usb3_irq_epc_pipe0_setup(struct renesas_usb3 *usb3)
1861 {
1862         struct usb_ctrlrequest ctrl;
1863         struct renesas_usb3_ep *usb3_ep = usb3_get_ep(usb3, 0);
1864
1865         /* Call giveback function if previous transfer is not completed */
1866         if (usb3_ep->started)
1867                 usb3_request_done(usb3_ep, usb3_get_request(usb3_ep),
1868                                   -ECONNRESET);
1869
1870         usb3_p0_con_clear_buffer(usb3);
1871         usb3_get_setup_data(usb3, &ctrl);
1872         if (!usb3_handle_standard_request(usb3, &ctrl))
1873                 if (usb3->driver->setup(&usb3->gadget, &ctrl) < 0)
1874                         usb3_set_p0_con_stall(usb3);
1875 }
1876
1877 static void usb3_irq_epc_pipe0_bfrdy(struct renesas_usb3 *usb3)
1878 {
1879         struct renesas_usb3_ep *usb3_ep = usb3_get_ep(usb3, 0);
1880         struct renesas_usb3_request *usb3_req = usb3_get_request(usb3_ep);
1881
1882         if (!usb3_req)
1883                 return;
1884
1885         usb3_p0_xfer(usb3_ep, usb3_req);
1886 }
1887
1888 static void usb3_irq_epc_pipe0(struct renesas_usb3 *usb3)
1889 {
1890         u32 p0_int_sta = usb3_read(usb3, USB3_P0_INT_STA);
1891
1892         p0_int_sta &= usb3_read(usb3, USB3_P0_INT_ENA);
1893         usb3_write(usb3, p0_int_sta, USB3_P0_INT_STA);
1894         if (p0_int_sta & P0_INT_STSED)
1895                 usb3_irq_epc_pipe0_status_end(usb3);
1896         if (p0_int_sta & P0_INT_SETUP)
1897                 usb3_irq_epc_pipe0_setup(usb3);
1898         if (p0_int_sta & P0_INT_BFRDY)
1899                 usb3_irq_epc_pipe0_bfrdy(usb3);
1900 }
1901
1902 static void usb3_request_done_pipen(struct renesas_usb3 *usb3,
1903                                     struct renesas_usb3_ep *usb3_ep,
1904                                     struct renesas_usb3_request *usb3_req,
1905                                     int status)
1906 {
1907         unsigned long flags;
1908
1909         spin_lock_irqsave(&usb3->lock, flags);
1910         if (usb3_pn_change(usb3, usb3_ep->num))
1911                 usb3_pn_stop(usb3);
1912         spin_unlock_irqrestore(&usb3->lock, flags);
1913
1914         usb3_disable_pipe_irq(usb3, usb3_ep->num);
1915         usb3_request_done(usb3_ep, usb3_req, status);
1916
1917         /* get next usb3_req */
1918         usb3_req = usb3_get_request(usb3_ep);
1919         if (usb3_req)
1920                 usb3_start_pipen(usb3_ep, usb3_req);
1921 }
1922
1923 static void usb3_irq_epc_pipen_lsttr(struct renesas_usb3 *usb3, int num)
1924 {
1925         struct renesas_usb3_ep *usb3_ep = usb3_get_ep(usb3, num);
1926         struct renesas_usb3_request *usb3_req = usb3_get_request(usb3_ep);
1927
1928         if (!usb3_req)
1929                 return;
1930
1931         if (usb3_ep->dir_in) {
1932                 dev_dbg(usb3_to_dev(usb3), "%s: len = %u, actual = %u\n",
1933                         __func__, usb3_req->req.length, usb3_req->req.actual);
1934                 usb3_request_done_pipen(usb3, usb3_ep, usb3_req, 0);
1935         }
1936 }
1937
1938 static void usb3_irq_epc_pipen_bfrdy(struct renesas_usb3 *usb3, int num)
1939 {
1940         struct renesas_usb3_ep *usb3_ep = usb3_get_ep(usb3, num);
1941         struct renesas_usb3_request *usb3_req = usb3_get_request(usb3_ep);
1942         bool done = false;
1943
1944         if (!usb3_req)
1945                 return;
1946
1947         spin_lock(&usb3->lock);
1948         if (usb3_pn_change(usb3, num))
1949                 goto out;
1950
1951         if (usb3_ep->dir_in) {
1952                 /* Do not stop the IN pipe here to detect LSTTR interrupt */
1953                 if (!usb3_write_pipe(usb3_ep, usb3_req, USB3_PN_WRITE))
1954                         usb3_clear_bit(usb3, PN_INT_BFRDY, USB3_PN_INT_ENA);
1955         } else {
1956                 if (!usb3_read_pipe(usb3_ep, usb3_req, USB3_PN_READ))
1957                         done = true;
1958         }
1959
1960 out:
1961         /* need to unlock because usb3_request_done_pipen() locks it */
1962         spin_unlock(&usb3->lock);
1963
1964         if (done)
1965                 usb3_request_done_pipen(usb3, usb3_ep, usb3_req, 0);
1966 }
1967
1968 static void usb3_irq_epc_pipen(struct renesas_usb3 *usb3, int num)
1969 {
1970         u32 pn_int_sta;
1971
1972         spin_lock(&usb3->lock);
1973         if (usb3_pn_change(usb3, num) < 0) {
1974                 spin_unlock(&usb3->lock);
1975                 return;
1976         }
1977
1978         pn_int_sta = usb3_read(usb3, USB3_PN_INT_STA);
1979         pn_int_sta &= usb3_read(usb3, USB3_PN_INT_ENA);
1980         usb3_write(usb3, pn_int_sta, USB3_PN_INT_STA);
1981         spin_unlock(&usb3->lock);
1982         if (pn_int_sta & PN_INT_LSTTR)
1983                 usb3_irq_epc_pipen_lsttr(usb3, num);
1984         if (pn_int_sta & PN_INT_BFRDY)
1985                 usb3_irq_epc_pipen_bfrdy(usb3, num);
1986 }
1987
1988 static void usb3_irq_epc_int_2(struct renesas_usb3 *usb3, u32 int_sta_2)
1989 {
1990         int i;
1991
1992         for (i = 0; i < usb3->num_usb3_eps; i++) {
1993                 if (int_sta_2 & USB_INT_2_PIPE(i)) {
1994                         if (!i)
1995                                 usb3_irq_epc_pipe0(usb3);
1996                         else
1997                                 usb3_irq_epc_pipen(usb3, i);
1998                 }
1999         }
2000 }
2001
2002 static void usb3_irq_idmon_change(struct renesas_usb3 *usb3)
2003 {
2004         usb3_check_id(usb3);
2005 }
2006
2007 static void usb3_irq_otg_int(struct renesas_usb3 *usb3, u32 otg_int_sta)
2008 {
2009         if (otg_int_sta & USB_OTG_IDMON)
2010                 usb3_irq_idmon_change(usb3);
2011 }
2012
2013 static void usb3_irq_epc(struct renesas_usb3 *usb3)
2014 {
2015         u32 int_sta_1 = usb3_read(usb3, USB3_USB_INT_STA_1);
2016         u32 int_sta_2 = usb3_read(usb3, USB3_USB_INT_STA_2);
2017         u32 otg_int_sta = usb3_read(usb3, USB3_USB_OTG_INT_STA);
2018
2019         int_sta_1 &= usb3_read(usb3, USB3_USB_INT_ENA_1);
2020         if (int_sta_1) {
2021                 usb3_write(usb3, int_sta_1, USB3_USB_INT_STA_1);
2022                 usb3_irq_epc_int_1(usb3, int_sta_1);
2023         }
2024
2025         int_sta_2 &= usb3_read(usb3, USB3_USB_INT_ENA_2);
2026         if (int_sta_2)
2027                 usb3_irq_epc_int_2(usb3, int_sta_2);
2028
2029         otg_int_sta &= usb3_read(usb3, USB3_USB_OTG_INT_ENA);
2030         if (otg_int_sta) {
2031                 usb3_write(usb3, otg_int_sta, USB3_USB_OTG_INT_STA);
2032                 usb3_irq_otg_int(usb3, otg_int_sta);
2033         }
2034 }
2035
2036 static void usb3_irq_dma_int(struct renesas_usb3 *usb3, u32 dma_sta)
2037 {
2038         struct renesas_usb3_ep *usb3_ep;
2039         struct renesas_usb3_request *usb3_req;
2040         int i, status;
2041
2042         for (i = 0; i < usb3->num_usb3_eps; i++) {
2043                 if (!(dma_sta & DMA_INT(i)))
2044                         continue;
2045
2046                 usb3_ep = usb3_get_ep(usb3, i);
2047                 if (!(usb3_read(usb3, USB3_AXI_INT_STA) &
2048                     AXI_INT_PRDEN_CLR_STA(usb3_ep->dma->num)))
2049                         continue;
2050
2051                 usb3_req = usb3_get_request(usb3_ep);
2052                 status = usb3_dma_try_stop(usb3_ep, usb3_req);
2053                 usb3_request_done_pipen(usb3, usb3_ep, usb3_req, status);
2054         }
2055 }
2056
2057 static void usb3_irq_dma(struct renesas_usb3 *usb3)
2058 {
2059         u32 dma_sta = usb3_read(usb3, USB3_DMA_INT_STA);
2060
2061         dma_sta &= usb3_read(usb3, USB3_DMA_INT_ENA);
2062         if (dma_sta) {
2063                 usb3_write(usb3, dma_sta, USB3_DMA_INT_STA);
2064                 usb3_irq_dma_int(usb3, dma_sta);
2065         }
2066 }
2067
2068 static irqreturn_t renesas_usb3_irq(int irq, void *_usb3)
2069 {
2070         struct renesas_usb3 *usb3 = _usb3;
2071         irqreturn_t ret = IRQ_NONE;
2072         u32 axi_int_sta = usb3_read(usb3, USB3_AXI_INT_STA);
2073
2074         if (axi_int_sta & AXI_INT_DMAINT) {
2075                 usb3_irq_dma(usb3);
2076                 ret = IRQ_HANDLED;
2077         }
2078
2079         if (axi_int_sta & AXI_INT_EPCINT) {
2080                 usb3_irq_epc(usb3);
2081                 ret = IRQ_HANDLED;
2082         }
2083
2084         return ret;
2085 }
2086
2087 static void usb3_write_pn_mod(struct renesas_usb3_ep *usb3_ep,
2088                               const struct usb_endpoint_descriptor *desc)
2089 {
2090         struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
2091         u32 val = 0;
2092
2093         val |= usb3_ep->dir_in ? PN_MOD_DIR : 0;
2094         val |= PN_MOD_TYPE(usb_endpoint_type(desc));
2095         val |= PN_MOD_EPNUM(usb_endpoint_num(desc));
2096         usb3_write(usb3, val, USB3_PN_MOD);
2097 }
2098
2099 static u32 usb3_calc_ramarea(int ram_size)
2100 {
2101         WARN_ON(ram_size > SZ_16K);
2102
2103         if (ram_size <= SZ_1K)
2104                 return PN_RAMMAP_RAMAREA_1KB;
2105         else if (ram_size <= SZ_2K)
2106                 return PN_RAMMAP_RAMAREA_2KB;
2107         else if (ram_size <= SZ_4K)
2108                 return PN_RAMMAP_RAMAREA_4KB;
2109         else if (ram_size <= SZ_8K)
2110                 return PN_RAMMAP_RAMAREA_8KB;
2111         else
2112                 return PN_RAMMAP_RAMAREA_16KB;
2113 }
2114
2115 static u32 usb3_calc_rammap_val(struct renesas_usb3_ep *usb3_ep,
2116                                 const struct usb_endpoint_descriptor *desc)
2117 {
2118         int i;
2119         static const u32 max_packet_array[] = {8, 16, 32, 64, 512};
2120         u32 mpkt = PN_RAMMAP_MPKT(1024);
2121
2122         for (i = 0; i < ARRAY_SIZE(max_packet_array); i++) {
2123                 if (usb_endpoint_maxp(desc) <= max_packet_array[i])
2124                         mpkt = PN_RAMMAP_MPKT(max_packet_array[i]);
2125         }
2126
2127         return usb3_ep->rammap_val | mpkt;
2128 }
2129
2130 static int usb3_enable_pipe_n(struct renesas_usb3_ep *usb3_ep,
2131                               const struct usb_endpoint_descriptor *desc)
2132 {
2133         struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
2134         unsigned long flags;
2135
2136         usb3_ep->dir_in = usb_endpoint_dir_in(desc);
2137
2138         spin_lock_irqsave(&usb3->lock, flags);
2139         if (!usb3_pn_change(usb3, usb3_ep->num)) {
2140                 usb3_write_pn_mod(usb3_ep, desc);
2141                 usb3_write(usb3, usb3_calc_rammap_val(usb3_ep, desc),
2142                            USB3_PN_RAMMAP);
2143                 usb3_pn_con_clear(usb3);
2144                 usb3_set_bit(usb3, PN_CON_EN, USB3_PN_CON);
2145         }
2146         spin_unlock_irqrestore(&usb3->lock, flags);
2147
2148         return 0;
2149 }
2150
2151 static int usb3_disable_pipe_n(struct renesas_usb3_ep *usb3_ep)
2152 {
2153         struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
2154         unsigned long flags;
2155
2156         usb3_ep->halt = false;
2157
2158         spin_lock_irqsave(&usb3->lock, flags);
2159         if (!usb3_pn_change(usb3, usb3_ep->num)) {
2160                 usb3_write(usb3, 0, USB3_PN_INT_ENA);
2161                 usb3_write(usb3, 0, USB3_PN_RAMMAP);
2162                 usb3_clear_bit(usb3, PN_CON_EN, USB3_PN_CON);
2163         }
2164         spin_unlock_irqrestore(&usb3->lock, flags);
2165
2166         return 0;
2167 }
2168
2169 /*------- usb_ep_ops -----------------------------------------------------*/
2170 static int renesas_usb3_ep_enable(struct usb_ep *_ep,
2171                                   const struct usb_endpoint_descriptor *desc)
2172 {
2173         struct renesas_usb3_ep *usb3_ep = usb_ep_to_usb3_ep(_ep);
2174
2175         return usb3_enable_pipe_n(usb3_ep, desc);
2176 }
2177
2178 static int renesas_usb3_ep_disable(struct usb_ep *_ep)
2179 {
2180         struct renesas_usb3_ep *usb3_ep = usb_ep_to_usb3_ep(_ep);
2181         struct renesas_usb3_request *usb3_req;
2182
2183         do {
2184                 usb3_req = usb3_get_request(usb3_ep);
2185                 if (!usb3_req)
2186                         break;
2187                 usb3_dma_try_stop(usb3_ep, usb3_req);
2188                 usb3_request_done(usb3_ep, usb3_req, -ESHUTDOWN);
2189         } while (1);
2190
2191         return usb3_disable_pipe_n(usb3_ep);
2192 }
2193
2194 static struct usb_request *__renesas_usb3_ep_alloc_request(gfp_t gfp_flags)
2195 {
2196         struct renesas_usb3_request *usb3_req;
2197
2198         usb3_req = kzalloc(sizeof(struct renesas_usb3_request), gfp_flags);
2199         if (!usb3_req)
2200                 return NULL;
2201
2202         INIT_LIST_HEAD(&usb3_req->queue);
2203
2204         return &usb3_req->req;
2205 }
2206
2207 static void __renesas_usb3_ep_free_request(struct usb_request *_req)
2208 {
2209         struct renesas_usb3_request *usb3_req = usb_req_to_usb3_req(_req);
2210
2211         kfree(usb3_req);
2212 }
2213
2214 static struct usb_request *renesas_usb3_ep_alloc_request(struct usb_ep *_ep,
2215                                                          gfp_t gfp_flags)
2216 {
2217         return __renesas_usb3_ep_alloc_request(gfp_flags);
2218 }
2219
2220 static void renesas_usb3_ep_free_request(struct usb_ep *_ep,
2221                                          struct usb_request *_req)
2222 {
2223         __renesas_usb3_ep_free_request(_req);
2224 }
2225
2226 static int renesas_usb3_ep_dequeue(struct usb_ep *_ep, struct usb_request *_req)
2227 {
2228         struct renesas_usb3_ep *usb3_ep = usb_ep_to_usb3_ep(_ep);
2229         struct renesas_usb3_request *usb3_req = usb_req_to_usb3_req(_req);
2230         struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
2231
2232         dev_dbg(usb3_to_dev(usb3), "ep_dequeue: ep%2d, %u\n", usb3_ep->num,
2233                 _req->length);
2234
2235         usb3_dma_try_stop(usb3_ep, usb3_req);
2236         usb3_request_done_pipen(usb3, usb3_ep, usb3_req, -ECONNRESET);
2237
2238         return 0;
2239 }
2240
2241 static int renesas_usb3_ep_set_halt(struct usb_ep *_ep, int value)
2242 {
2243         return usb3_set_halt(usb_ep_to_usb3_ep(_ep), !!value, false);
2244 }
2245
2246 static int renesas_usb3_ep_set_wedge(struct usb_ep *_ep)
2247 {
2248         struct renesas_usb3_ep *usb3_ep = usb_ep_to_usb3_ep(_ep);
2249
2250         usb3_ep->wedge = true;
2251         return usb3_set_halt(usb3_ep, true, false);
2252 }
2253
2254 static void renesas_usb3_ep_fifo_flush(struct usb_ep *_ep)
2255 {
2256         struct renesas_usb3_ep *usb3_ep = usb_ep_to_usb3_ep(_ep);
2257         struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
2258         unsigned long flags;
2259
2260         if (usb3_ep->num) {
2261                 spin_lock_irqsave(&usb3->lock, flags);
2262                 if (!usb3_pn_change(usb3, usb3_ep->num)) {
2263                         usb3_pn_con_clear(usb3);
2264                         usb3_set_bit(usb3, PN_CON_EN, USB3_PN_CON);
2265                 }
2266                 spin_unlock_irqrestore(&usb3->lock, flags);
2267         } else {
2268                 usb3_p0_con_clear_buffer(usb3);
2269         }
2270 }
2271
2272 static const struct usb_ep_ops renesas_usb3_ep_ops = {
2273         .enable         = renesas_usb3_ep_enable,
2274         .disable        = renesas_usb3_ep_disable,
2275
2276         .alloc_request  = renesas_usb3_ep_alloc_request,
2277         .free_request   = renesas_usb3_ep_free_request,
2278
2279         .queue          = renesas_usb3_ep_queue,
2280         .dequeue        = renesas_usb3_ep_dequeue,
2281
2282         .set_halt       = renesas_usb3_ep_set_halt,
2283         .set_wedge      = renesas_usb3_ep_set_wedge,
2284         .fifo_flush     = renesas_usb3_ep_fifo_flush,
2285 };
2286
2287 /*------- usb_gadget_ops -------------------------------------------------*/
2288 static int renesas_usb3_start(struct usb_gadget *gadget,
2289                               struct usb_gadget_driver *driver)
2290 {
2291         struct renesas_usb3 *usb3;
2292
2293         if (!driver || driver->max_speed < USB_SPEED_FULL ||
2294             !driver->setup)
2295                 return -EINVAL;
2296
2297         usb3 = gadget_to_renesas_usb3(gadget);
2298
2299         /* hook up the driver */
2300         usb3->driver = driver;
2301
2302         if (usb3->phy)
2303                 phy_init(usb3->phy);
2304
2305         pm_runtime_get_sync(usb3_to_dev(usb3));
2306
2307         renesas_usb3_init_controller(usb3);
2308
2309         return 0;
2310 }
2311
2312 static int renesas_usb3_stop(struct usb_gadget *gadget)
2313 {
2314         struct renesas_usb3 *usb3 = gadget_to_renesas_usb3(gadget);
2315
2316         usb3->softconnect = false;
2317         usb3->gadget.speed = USB_SPEED_UNKNOWN;
2318         usb3->driver = NULL;
2319         renesas_usb3_stop_controller(usb3);
2320
2321         if (usb3->phy)
2322                 phy_exit(usb3->phy);
2323
2324         pm_runtime_put(usb3_to_dev(usb3));
2325
2326         return 0;
2327 }
2328
2329 static int renesas_usb3_get_frame(struct usb_gadget *_gadget)
2330 {
2331         return -EOPNOTSUPP;
2332 }
2333
2334 static int renesas_usb3_pullup(struct usb_gadget *gadget, int is_on)
2335 {
2336         struct renesas_usb3 *usb3 = gadget_to_renesas_usb3(gadget);
2337
2338         usb3->softconnect = !!is_on;
2339
2340         return 0;
2341 }
2342
2343 static int renesas_usb3_set_selfpowered(struct usb_gadget *gadget, int is_self)
2344 {
2345         gadget->is_selfpowered = !!is_self;
2346
2347         return 0;
2348 }
2349
2350 static const struct usb_gadget_ops renesas_usb3_gadget_ops = {
2351         .get_frame              = renesas_usb3_get_frame,
2352         .udc_start              = renesas_usb3_start,
2353         .udc_stop               = renesas_usb3_stop,
2354         .pullup                 = renesas_usb3_pullup,
2355         .set_selfpowered        = renesas_usb3_set_selfpowered,
2356 };
2357
2358 static enum usb_role renesas_usb3_role_switch_get(struct usb_role_switch *sw)
2359 {
2360         struct renesas_usb3 *usb3 = usb_role_switch_get_drvdata(sw);
2361         enum usb_role cur_role;
2362
2363         pm_runtime_get_sync(usb3_to_dev(usb3));
2364         cur_role = usb3_is_host(usb3) ? USB_ROLE_HOST : USB_ROLE_DEVICE;
2365         pm_runtime_put(usb3_to_dev(usb3));
2366
2367         return cur_role;
2368 }
2369
2370 static void handle_ext_role_switch_states(struct device *dev,
2371                                             enum usb_role role)
2372 {
2373         struct renesas_usb3 *usb3 = dev_get_drvdata(dev);
2374         struct device *host = usb3->host_dev;
2375         enum usb_role cur_role = renesas_usb3_role_switch_get(usb3->role_sw);
2376
2377         switch (role) {
2378         case USB_ROLE_NONE:
2379                 usb3->connection_state = USB_ROLE_NONE;
2380                 if (usb3->driver)
2381                         usb3_disconnect(usb3);
2382                 usb3_vbus_out(usb3, false);
2383                 break;
2384         case USB_ROLE_DEVICE:
2385                 if (usb3->connection_state == USB_ROLE_NONE) {
2386                         usb3->connection_state = USB_ROLE_DEVICE;
2387                         usb3_set_mode(usb3, false);
2388                         if (usb3->driver)
2389                                 usb3_connect(usb3);
2390                 } else if (cur_role == USB_ROLE_HOST)  {
2391                         device_release_driver(host);
2392                         usb3_set_mode(usb3, false);
2393                         if (usb3->driver)
2394                                 usb3_connect(usb3);
2395                 }
2396                 usb3_vbus_out(usb3, false);
2397                 break;
2398         case USB_ROLE_HOST:
2399                 if (usb3->connection_state == USB_ROLE_NONE) {
2400                         if (usb3->driver)
2401                                 usb3_disconnect(usb3);
2402
2403                         usb3->connection_state = USB_ROLE_HOST;
2404                         usb3_set_mode(usb3, true);
2405                         usb3_vbus_out(usb3, true);
2406                         if (device_attach(host) < 0)
2407                                 dev_err(dev, "device_attach(host) failed\n");
2408                 } else if (cur_role == USB_ROLE_DEVICE) {
2409                         usb3_disconnect(usb3);
2410                         /* Must set the mode before device_attach of the host */
2411                         usb3_set_mode(usb3, true);
2412                         /* This device_attach() might sleep */
2413                         if (device_attach(host) < 0)
2414                                 dev_err(dev, "device_attach(host) failed\n");
2415                 }
2416                 break;
2417         default:
2418                 break;
2419         }
2420 }
2421
2422 static void handle_role_switch_states(struct device *dev,
2423                                             enum usb_role role)
2424 {
2425         struct renesas_usb3 *usb3 = dev_get_drvdata(dev);
2426         struct device *host = usb3->host_dev;
2427         enum usb_role cur_role = renesas_usb3_role_switch_get(usb3->role_sw);
2428
2429         if (cur_role == USB_ROLE_HOST && role == USB_ROLE_DEVICE) {
2430                 device_release_driver(host);
2431                 usb3_set_mode(usb3, false);
2432         } else if (cur_role == USB_ROLE_DEVICE && role == USB_ROLE_HOST) {
2433                 /* Must set the mode before device_attach of the host */
2434                 usb3_set_mode(usb3, true);
2435                 /* This device_attach() might sleep */
2436                 if (device_attach(host) < 0)
2437                         dev_err(dev, "device_attach(host) failed\n");
2438         }
2439 }
2440
2441 static int renesas_usb3_role_switch_set(struct usb_role_switch *sw,
2442                                         enum usb_role role)
2443 {
2444         struct renesas_usb3 *usb3 = usb_role_switch_get_drvdata(sw);
2445
2446         pm_runtime_get_sync(usb3_to_dev(usb3));
2447
2448         if (usb3->role_sw_by_connector)
2449                 handle_ext_role_switch_states(usb3_to_dev(usb3), role);
2450         else
2451                 handle_role_switch_states(usb3_to_dev(usb3), role);
2452
2453         pm_runtime_put(usb3_to_dev(usb3));
2454
2455         return 0;
2456 }
2457
2458 static ssize_t role_store(struct device *dev, struct device_attribute *attr,
2459                           const char *buf, size_t count)
2460 {
2461         struct renesas_usb3 *usb3 = dev_get_drvdata(dev);
2462         bool new_mode_is_host;
2463
2464         if (!usb3->driver)
2465                 return -ENODEV;
2466
2467         if (usb3->forced_b_device)
2468                 return -EBUSY;
2469
2470         if (sysfs_streq(buf, "host"))
2471                 new_mode_is_host = true;
2472         else if (sysfs_streq(buf, "peripheral"))
2473                 new_mode_is_host = false;
2474         else
2475                 return -EINVAL;
2476
2477         if (new_mode_is_host == usb3_is_host(usb3))
2478                 return -EINVAL;
2479
2480         usb3_mode_config(usb3, new_mode_is_host, usb3_is_a_device(usb3));
2481
2482         return count;
2483 }
2484
2485 static ssize_t role_show(struct device *dev, struct device_attribute *attr,
2486                          char *buf)
2487 {
2488         struct renesas_usb3 *usb3 = dev_get_drvdata(dev);
2489
2490         if (!usb3->driver)
2491                 return -ENODEV;
2492
2493         return sprintf(buf, "%s\n", usb3_is_host(usb3) ? "host" : "peripheral");
2494 }
2495 static DEVICE_ATTR_RW(role);
2496
2497 static int renesas_usb3_b_device_show(struct seq_file *s, void *unused)
2498 {
2499         struct renesas_usb3 *usb3 = s->private;
2500
2501         seq_printf(s, "%d\n", usb3->forced_b_device);
2502
2503         return 0;
2504 }
2505
2506 static int renesas_usb3_b_device_open(struct inode *inode, struct file *file)
2507 {
2508         return single_open(file, renesas_usb3_b_device_show, inode->i_private);
2509 }
2510
2511 static ssize_t renesas_usb3_b_device_write(struct file *file,
2512                                            const char __user *ubuf,
2513                                            size_t count, loff_t *ppos)
2514 {
2515         struct seq_file *s = file->private_data;
2516         struct renesas_usb3 *usb3 = s->private;
2517         char buf[32];
2518
2519         if (!usb3->driver)
2520                 return -ENODEV;
2521
2522         if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
2523                 return -EFAULT;
2524
2525         usb3->start_to_connect = false;
2526         if (usb3->workaround_for_vbus && usb3->forced_b_device &&
2527             !strncmp(buf, "2", 1))
2528                 usb3->start_to_connect = true;
2529         else if (!strncmp(buf, "1", 1))
2530                 usb3->forced_b_device = true;
2531         else
2532                 usb3->forced_b_device = false;
2533
2534         if (usb3->workaround_for_vbus)
2535                 usb3_disconnect(usb3);
2536
2537         /* Let this driver call usb3_connect() if needed */
2538         usb3_check_id(usb3);
2539
2540         return count;
2541 }
2542
2543 static const struct file_operations renesas_usb3_b_device_fops = {
2544         .open = renesas_usb3_b_device_open,
2545         .write = renesas_usb3_b_device_write,
2546         .read = seq_read,
2547         .llseek = seq_lseek,
2548         .release = single_release,
2549 };
2550
2551 static void renesas_usb3_debugfs_init(struct renesas_usb3 *usb3,
2552                                       struct device *dev)
2553 {
2554         usb3->dentry = debugfs_create_dir(dev_name(dev), usb_debug_root);
2555
2556         debugfs_create_file("b_device", 0644, usb3->dentry, usb3,
2557                             &renesas_usb3_b_device_fops);
2558 }
2559
2560 /*------- platform_driver ------------------------------------------------*/
2561 static int renesas_usb3_remove(struct platform_device *pdev)
2562 {
2563         struct renesas_usb3 *usb3 = platform_get_drvdata(pdev);
2564
2565         debugfs_remove_recursive(usb3->dentry);
2566         device_remove_file(&pdev->dev, &dev_attr_role);
2567
2568         usb_role_switch_unregister(usb3->role_sw);
2569
2570         usb_del_gadget_udc(&usb3->gadget);
2571         renesas_usb3_dma_free_prd(usb3, &pdev->dev);
2572
2573         __renesas_usb3_ep_free_request(usb3->ep0_req);
2574         pm_runtime_disable(&pdev->dev);
2575
2576         return 0;
2577 }
2578
2579 static int renesas_usb3_init_ep(struct renesas_usb3 *usb3, struct device *dev,
2580                                 const struct renesas_usb3_priv *priv)
2581 {
2582         struct renesas_usb3_ep *usb3_ep;
2583         int i;
2584
2585         /* calculate num_usb3_eps from renesas_usb3_priv */
2586         usb3->num_usb3_eps = priv->ramsize_per_ramif * priv->num_ramif * 2 /
2587                              priv->ramsize_per_pipe + 1;
2588
2589         if (usb3->num_usb3_eps > USB3_MAX_NUM_PIPES)
2590                 usb3->num_usb3_eps = USB3_MAX_NUM_PIPES;
2591
2592         usb3->usb3_ep = devm_kcalloc(dev,
2593                                      usb3->num_usb3_eps, sizeof(*usb3_ep),
2594                                      GFP_KERNEL);
2595         if (!usb3->usb3_ep)
2596                 return -ENOMEM;
2597
2598         dev_dbg(dev, "%s: num_usb3_eps = %d\n", __func__, usb3->num_usb3_eps);
2599         /*
2600          * This driver prepares pipes as follows:
2601          *  - odd pipes = IN pipe
2602          *  - even pipes = OUT pipe (except pipe 0)
2603          */
2604         usb3_for_each_ep(usb3_ep, usb3, i) {
2605                 snprintf(usb3_ep->ep_name, sizeof(usb3_ep->ep_name), "ep%d", i);
2606                 usb3_ep->usb3 = usb3;
2607                 usb3_ep->num = i;
2608                 usb3_ep->ep.name = usb3_ep->ep_name;
2609                 usb3_ep->ep.ops = &renesas_usb3_ep_ops;
2610                 INIT_LIST_HEAD(&usb3_ep->queue);
2611                 INIT_LIST_HEAD(&usb3_ep->ep.ep_list);
2612                 if (!i) {
2613                         /* for control pipe */
2614                         usb3->gadget.ep0 = &usb3_ep->ep;
2615                         usb_ep_set_maxpacket_limit(&usb3_ep->ep,
2616                                                 USB3_EP0_SS_MAX_PACKET_SIZE);
2617                         usb3_ep->ep.caps.type_control = true;
2618                         usb3_ep->ep.caps.dir_in = true;
2619                         usb3_ep->ep.caps.dir_out = true;
2620                         continue;
2621                 }
2622
2623                 /* for bulk or interrupt pipe */
2624                 usb_ep_set_maxpacket_limit(&usb3_ep->ep, ~0);
2625                 list_add_tail(&usb3_ep->ep.ep_list, &usb3->gadget.ep_list);
2626                 usb3_ep->ep.caps.type_bulk = true;
2627                 usb3_ep->ep.caps.type_int = true;
2628                 if (i & 1)
2629                         usb3_ep->ep.caps.dir_in = true;
2630                 else
2631                         usb3_ep->ep.caps.dir_out = true;
2632         }
2633
2634         return 0;
2635 }
2636
2637 static void renesas_usb3_init_ram(struct renesas_usb3 *usb3, struct device *dev,
2638                                   const struct renesas_usb3_priv *priv)
2639 {
2640         struct renesas_usb3_ep *usb3_ep;
2641         int i;
2642         u32 ramif[2], basead[2];        /* index 0 = for IN pipes */
2643         u32 *cur_ramif, *cur_basead;
2644         u32 val;
2645
2646         memset(ramif, 0, sizeof(ramif));
2647         memset(basead, 0, sizeof(basead));
2648
2649         /*
2650          * This driver prepares pipes as follows:
2651          *  - all pipes = the same size as "ramsize_per_pipe"
2652          * Please refer to the "Method of Specifying RAM Mapping"
2653          */
2654         usb3_for_each_ep(usb3_ep, usb3, i) {
2655                 if (!i)
2656                         continue;       /* out of scope if ep num = 0 */
2657                 if (usb3_ep->ep.caps.dir_in) {
2658                         cur_ramif = &ramif[0];
2659                         cur_basead = &basead[0];
2660                 } else {
2661                         cur_ramif = &ramif[1];
2662                         cur_basead = &basead[1];
2663                 }
2664
2665                 if (*cur_basead > priv->ramsize_per_ramif)
2666                         continue;       /* out of memory for IN or OUT pipe */
2667
2668                 /* calculate rammap_val */
2669                 val = PN_RAMMAP_RAMIF(*cur_ramif);
2670                 val |= usb3_calc_ramarea(priv->ramsize_per_pipe);
2671                 val |= PN_RAMMAP_BASEAD(*cur_basead);
2672                 usb3_ep->rammap_val = val;
2673
2674                 dev_dbg(dev, "ep%2d: val = %08x, ramif = %d, base = %x\n",
2675                         i, val, *cur_ramif, *cur_basead);
2676
2677                 /* update current ramif */
2678                 if (*cur_ramif + 1 == priv->num_ramif) {
2679                         *cur_ramif = 0;
2680                         *cur_basead += priv->ramsize_per_pipe;
2681                 } else {
2682                         (*cur_ramif)++;
2683                 }
2684         }
2685 }
2686
2687 static const struct renesas_usb3_priv renesas_usb3_priv_r8a7795_es1 = {
2688         .ramsize_per_ramif = SZ_16K,
2689         .num_ramif = 2,
2690         .ramsize_per_pipe = SZ_4K,
2691         .workaround_for_vbus = true,
2692 };
2693
2694 static const struct renesas_usb3_priv renesas_usb3_priv_gen3 = {
2695         .ramsize_per_ramif = SZ_16K,
2696         .num_ramif = 4,
2697         .ramsize_per_pipe = SZ_4K,
2698 };
2699
2700 static const struct renesas_usb3_priv renesas_usb3_priv_r8a77990 = {
2701         .ramsize_per_ramif = SZ_16K,
2702         .num_ramif = 4,
2703         .ramsize_per_pipe = SZ_4K,
2704         .workaround_for_vbus = true,
2705 };
2706
2707 static const struct of_device_id usb3_of_match[] = {
2708         {
2709                 .compatible = "renesas,r8a7795-usb3-peri",
2710                 .data = &renesas_usb3_priv_gen3,
2711         },
2712         {
2713                 .compatible = "renesas,rcar-gen3-usb3-peri",
2714                 .data = &renesas_usb3_priv_gen3,
2715         },
2716         { },
2717 };
2718 MODULE_DEVICE_TABLE(of, usb3_of_match);
2719
2720 static const struct soc_device_attribute renesas_usb3_quirks_match[] = {
2721         {
2722                 .soc_id = "r8a774c0",
2723                 .data = &renesas_usb3_priv_r8a77990,
2724         },
2725         {
2726                 .soc_id = "r8a7795", .revision = "ES1.*",
2727                 .data = &renesas_usb3_priv_r8a7795_es1,
2728         },
2729         {
2730                 .soc_id = "r8a77990",
2731                 .data = &renesas_usb3_priv_r8a77990,
2732         },
2733         { /* sentinel */ },
2734 };
2735
2736 static const unsigned int renesas_usb3_cable[] = {
2737         EXTCON_USB,
2738         EXTCON_USB_HOST,
2739         EXTCON_NONE,
2740 };
2741
2742 static struct usb_role_switch_desc renesas_usb3_role_switch_desc = {
2743         .set = renesas_usb3_role_switch_set,
2744         .get = renesas_usb3_role_switch_get,
2745         .allow_userspace_control = true,
2746 };
2747
2748 static int renesas_usb3_probe(struct platform_device *pdev)
2749 {
2750         struct renesas_usb3 *usb3;
2751         int irq, ret;
2752         const struct renesas_usb3_priv *priv;
2753         const struct soc_device_attribute *attr;
2754
2755         attr = soc_device_match(renesas_usb3_quirks_match);
2756         if (attr)
2757                 priv = attr->data;
2758         else
2759                 priv = of_device_get_match_data(&pdev->dev);
2760
2761         irq = platform_get_irq(pdev, 0);
2762         if (irq < 0)
2763                 return irq;
2764
2765         usb3 = devm_kzalloc(&pdev->dev, sizeof(*usb3), GFP_KERNEL);
2766         if (!usb3)
2767                 return -ENOMEM;
2768
2769         usb3->reg = devm_platform_ioremap_resource(pdev, 0);
2770         if (IS_ERR(usb3->reg))
2771                 return PTR_ERR(usb3->reg);
2772
2773         platform_set_drvdata(pdev, usb3);
2774         spin_lock_init(&usb3->lock);
2775
2776         usb3->gadget.ops = &renesas_usb3_gadget_ops;
2777         usb3->gadget.name = udc_name;
2778         usb3->gadget.max_speed = USB_SPEED_SUPER;
2779         INIT_LIST_HEAD(&usb3->gadget.ep_list);
2780         ret = renesas_usb3_init_ep(usb3, &pdev->dev, priv);
2781         if (ret < 0)
2782                 return ret;
2783         renesas_usb3_init_ram(usb3, &pdev->dev, priv);
2784
2785         ret = devm_request_irq(&pdev->dev, irq, renesas_usb3_irq, 0,
2786                                dev_name(&pdev->dev), usb3);
2787         if (ret < 0)
2788                 return ret;
2789
2790         INIT_WORK(&usb3->extcon_work, renesas_usb3_extcon_work);
2791         usb3->extcon = devm_extcon_dev_allocate(&pdev->dev, renesas_usb3_cable);
2792         if (IS_ERR(usb3->extcon))
2793                 return PTR_ERR(usb3->extcon);
2794
2795         ret = devm_extcon_dev_register(&pdev->dev, usb3->extcon);
2796         if (ret < 0) {
2797                 dev_err(&pdev->dev, "Failed to register extcon\n");
2798                 return ret;
2799         }
2800
2801         /* for ep0 handling */
2802         usb3->ep0_req = __renesas_usb3_ep_alloc_request(GFP_KERNEL);
2803         if (!usb3->ep0_req)
2804                 return -ENOMEM;
2805
2806         ret = renesas_usb3_dma_alloc_prd(usb3, &pdev->dev);
2807         if (ret < 0)
2808                 goto err_alloc_prd;
2809
2810         /*
2811          * This is optional. So, if this driver cannot get a phy,
2812          * this driver will not handle a phy anymore.
2813          */
2814         usb3->phy = devm_phy_optional_get(&pdev->dev, "usb");
2815         if (IS_ERR(usb3->phy)) {
2816                 ret = PTR_ERR(usb3->phy);
2817                 goto err_add_udc;
2818         }
2819
2820         pm_runtime_enable(&pdev->dev);
2821         ret = usb_add_gadget_udc(&pdev->dev, &usb3->gadget);
2822         if (ret < 0)
2823                 goto err_add_udc;
2824
2825         ret = device_create_file(&pdev->dev, &dev_attr_role);
2826         if (ret < 0)
2827                 goto err_dev_create;
2828
2829         if (device_property_read_bool(&pdev->dev, "usb-role-switch")) {
2830                 usb3->role_sw_by_connector = true;
2831                 renesas_usb3_role_switch_desc.fwnode = dev_fwnode(&pdev->dev);
2832         }
2833
2834         renesas_usb3_role_switch_desc.driver_data = usb3;
2835
2836         INIT_WORK(&usb3->role_work, renesas_usb3_role_work);
2837         usb3->role_sw = usb_role_switch_register(&pdev->dev,
2838                                         &renesas_usb3_role_switch_desc);
2839         if (!IS_ERR(usb3->role_sw)) {
2840                 usb3->host_dev = usb_of_get_companion_dev(&pdev->dev);
2841                 if (!usb3->host_dev) {
2842                         /* If not found, this driver will not use a role sw */
2843                         usb_role_switch_unregister(usb3->role_sw);
2844                         usb3->role_sw = NULL;
2845                 }
2846         } else {
2847                 usb3->role_sw = NULL;
2848         }
2849
2850         usb3->workaround_for_vbus = priv->workaround_for_vbus;
2851
2852         renesas_usb3_debugfs_init(usb3, &pdev->dev);
2853
2854         dev_info(&pdev->dev, "probed%s\n", usb3->phy ? " with phy" : "");
2855
2856         return 0;
2857
2858 err_dev_create:
2859         usb_del_gadget_udc(&usb3->gadget);
2860
2861 err_add_udc:
2862         renesas_usb3_dma_free_prd(usb3, &pdev->dev);
2863
2864 err_alloc_prd:
2865         __renesas_usb3_ep_free_request(usb3->ep0_req);
2866
2867         return ret;
2868 }
2869
2870 #ifdef CONFIG_PM_SLEEP
2871 static int renesas_usb3_suspend(struct device *dev)
2872 {
2873         struct renesas_usb3 *usb3 = dev_get_drvdata(dev);
2874
2875         /* Not started */
2876         if (!usb3->driver)
2877                 return 0;
2878
2879         renesas_usb3_stop_controller(usb3);
2880         if (usb3->phy)
2881                 phy_exit(usb3->phy);
2882         pm_runtime_put(dev);
2883
2884         return 0;
2885 }
2886
2887 static int renesas_usb3_resume(struct device *dev)
2888 {
2889         struct renesas_usb3 *usb3 = dev_get_drvdata(dev);
2890
2891         /* Not started */
2892         if (!usb3->driver)
2893                 return 0;
2894
2895         if (usb3->phy)
2896                 phy_init(usb3->phy);
2897         pm_runtime_get_sync(dev);
2898         renesas_usb3_init_controller(usb3);
2899
2900         return 0;
2901 }
2902 #endif
2903
2904 static SIMPLE_DEV_PM_OPS(renesas_usb3_pm_ops, renesas_usb3_suspend,
2905                         renesas_usb3_resume);
2906
2907 static struct platform_driver renesas_usb3_driver = {
2908         .probe          = renesas_usb3_probe,
2909         .remove         = renesas_usb3_remove,
2910         .driver         = {
2911                 .name = udc_name,
2912                 .pm             = &renesas_usb3_pm_ops,
2913                 .of_match_table = of_match_ptr(usb3_of_match),
2914         },
2915 };
2916 module_platform_driver(renesas_usb3_driver);
2917
2918 MODULE_DESCRIPTION("Renesas USB3.0 Peripheral driver");
2919 MODULE_LICENSE("GPL v2");
2920 MODULE_AUTHOR("Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>");
2921 MODULE_ALIAS("platform:renesas_usb3");